1641562225 has 6 divisors (see below), whose sum is σ = 2035537190. Its totient is φ = 1313249760.

The previous prime is 1641562217. The next prime is 1641562271. The reversal of 1641562225 is 5222651461.

It can be written as a sum of positive squares in 3 ways, for example, as 121264144 + 1520298081 = 11012^2 + 38991^2 .

It is not a de Polignac number, because 1641562225 - 2³ = 1641562217 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 32831220 + ... + 32831269.

Almost surely, 2^1641562225 is an apocalyptic number.

It is an amenable number.

1641562225 is a deficient number, since it is larger than the sum of its proper divisors (393974965).

1641562225 is an equidigital number, since it uses as much as digits as its factorization.

1641562225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65662499 (or 65662494 counting only the distinct ones).

The product of its digits is 28800, while the sum is 34.

The square root of 1641562225 is about 40516.1970698139. The cubic root of 1641562225 is about 1179.6480385233.

The spelling of 1641562225 in words is "one billion, six hundred forty-one million, five hundred sixty-two thousand, two hundred twenty-five".