51534465 has 32 divisors (see below), whose sum is σ = 84334080. Its totient is φ = 26866944.

The previous prime is 51534449. The next prime is 51534473. The reversal of 51534465 is 56443515.

It is not a de Polignac number, because 51534465 - 2⁴ = 51534449 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 185907 + ... + 186183.

It is an arithmetic number, because the mean of its divisors is an integer number (2635440).

Almost surely, 2^51534465 is an apocalyptic number.

It is an amenable number.

51534465 is a deficient number, since it is larger than the sum of its proper divisors (32799615).

51534465 is a wasteful number, since it uses less digits than its factorization.

51534465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521.

The product of its digits is 36000, while the sum is 33.

The square root of 51534465 is about 7178.7509359219. The cubic root of 51534465 is about 372.1339195831.

It can be divided in two parts, 515 and 34465, that added together give a triangular number (34980 = T₂₆₄).

The spelling of 51534465 in words is "fifty-one million, five hundred thirty-four thousand, four hundred sixty-five".