55915696225 has 9 divisors (see below), whose sum is σ = 69336929433. Its totient is φ = 44731611120.

The previous prime is 55915696219. The next prime is 55915696273. The reversal of 55915696225 is 52269651955.

The square root of 55915696225 is 236465.

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

It can be written as a sum of positive squares in 4 ways, for example, as 453562209 + 55462134016 = 21297^2 + 235504^2 .

It is not a de Polignac number, because 55915696225 - 2⁹ = 55915695713 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1158679 + ... + 1205971.

Almost surely, 2^55915696225 is an apocalyptic number.

55915696225 is the 236465-th square number.

55915696225 is the 118233-rd centered octagonal number.

It is an amenable number.

55915696225 is a deficient number, since it is larger than the sum of its proper divisors (13421233208).

55915696225 is an frugal number, since it uses more digits than its factorization.

55915696225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94596 (or 47298 counting only the distinct ones).

The product of its digits is 7290000, while the sum is 55.

The spelling of 55915696225 in words is "fifty-five billion, nine hundred fifteen million, six hundred ninety-six thousand, two hundred twenty-five".