51641265 has 16 divisors (see below), whose sum is σ = 88982208. Its totient is φ = 25423296.

The previous prime is 51641231. The next prime is 51641267. The reversal of 51641265 is 56214615.

It is not a de Polignac number, because 51641265 - 2⁷ = 51641137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51641267) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132219 + ... + 132608.

It is an arithmetic number, because the mean of its divisors is an integer number (5561388).

Almost surely, 2^51641265 is an apocalyptic number.

It is an amenable number.

51641265 is a deficient number, since it is larger than the sum of its proper divisors (37340943).

51641265 is a wasteful number, since it uses less digits than its factorization.

51641265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264848.

The product of its digits is 7200, while the sum is 30.

The square root of 51641265 is about 7186.1857059222. The cubic root of 51641265 is about 372.3908122541.

The spelling of 51641265 in words is "fifty-one million, six hundred forty-one thousand, two hundred sixty-five".