1551264225 has 24 divisors (see below), whose sum is σ = 2931151680. Its totient is φ = 709149120.

The previous prime is 1551264203. The next prime is 1551264227. The reversal of 1551264225 is 5224621551.

It is not a de Polignac number, because 1551264225 - 2⁷ = 1551264097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1551264227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1476870 + ... + 1477919.

It is an arithmetic number, because the mean of its divisors is an integer number (122131320).

Almost surely, 2^1551264225 is an apocalyptic number.

1551264225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1551264225 is a deficient number, since it is larger than the sum of its proper divisors (1379887455).

1551264225 is a wasteful number, since it uses less digits than its factorization.

1551264225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2954809 (or 2954804 counting only the distinct ones).

The product of its digits is 24000, while the sum is 33.

The square root of 1551264225 is about 39386.0917710808. The cubic root of 1551264225 is about 1157.6090827633.

Adding to 1551264225 its reverse (5224621551), we get a palindrome (6775885776).

The spelling of 1551264225 in words is "one billion, five hundred fifty-one million, two hundred sixty-four thousand, two hundred twenty-five".