51023151504 has 160 divisors (see below), whose sum is σ = 157950723840. Its totient is φ = 15676581888.

The previous prime is 51023151499. The next prime is 51023151521. The reversal of 51023151504 is 40515132015.

51023151504 is a `hidden beast` number, since 5 + 1 + 0 + 2 + 3 + 151 + 504 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 4076584 + ... + 4089080.

It is an arithmetic number, because the mean of its divisors is an integer number (987192024).

Almost surely, 2^51023151504 is an apocalyptic number.

51023151504 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51023151504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78975361920).

51023151504 is an abundant number, since it is smaller than the sum of its proper divisors (106927572336).

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

51023151504 is a wasteful number, since it uses less digits than its factorization.

51023151504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13254 (or 13242 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

Adding to 51023151504 its reverse (40515132015), we get a palindrome (91538283519).

The spelling of 51023151504 in words is "fifty-one billion, twenty-three million, one hundred fifty-one thousand, five hundred four".