1651203225 has 189 divisors, whose sum is σ = 3656009583. Its totient is φ = 737281440.

The previous prime is 1651203199. The next prime is 1651203259. The reversal of 1651203225 is 5223021561.

It is a happy number.

The square root of 1651203225 is 40635.

It is a perfect power (a square), and thus also a powerful number.

1651203225 is a `hidden beast` number, since 1 + 651 + 2 + 0 + 3 + 2 + 2 + 5 = 666.

It can be written as a sum of positive squares in only one way, i.e., 594433161 + 1056770064 = 24381^2 + 32508^2 .

It is a tau number, because it is divible by the number of its divisors (189).

It is not a de Polignac number, because 1651203225 - 2²¹ = 1649106073 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 188 ways as a sum of consecutive naturals, for example, 38400054 + ... + 38400096.

Almost surely, 2^1651203225 is an apocalyptic number.

1651203225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1651203225 is the 40635-th square number.

1651203225 is the 20318-th centered octagonal number.

It is an amenable number.

1651203225 is an abundant number, since it is smaller than the sum of its proper divisors (2004806358).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1651203225 is an frugal number, since it uses more digits than its factorization.

1651203225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128 (or 58 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The cubic root of 1651203225 is about 1181.9529149736.

Multiplying 1651203225 by its product of nonzero digits (3600), we get a square (5944331610000 = 2438100²).

Adding to 1651203225 its reverse (5223021561), we get a palindrome (6874224786).

The spelling of 1651203225 in words is "one billion, six hundred fifty-one million, two hundred three thousand, two hundred twenty-five".