51051023520 has 96 divisors (see below), whose sum is σ = 183783696768. Its totient is φ = 11668804608.

The previous prime is 51051023519. The next prime is 51051023521. The reversal of 51051023520 is 2532015015.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (51051023519) and next prime (51051023521).

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (51051023521) 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, 7593519 + ... + 7600238.

It is an arithmetic number, because the mean of its divisors is an integer number (1914413508).

Almost surely, 2^51051023520 is an apocalyptic number.

It is an amenable number.

51051023520 is an abundant number, since it is smaller than the sum of its proper divisors (132732673248).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51051023520 is a wasteful number, since it uses less digits than its factorization.

51051023520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15193782 (or 15193774 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 24.

Adding to 51051023520 its reverse (2532015015), we get a palindrome (53583038535).

The spelling of 51051023520 in words is "fifty-one billion, fifty-one million, twenty-three thousand, five hundred twenty".