51151364238 has 32 divisors (see below), whose sum is σ = 110190671136. Its totient is φ = 15736238208.

The previous prime is 51151364237. The next prime is 51151364249. The reversal of 51151364238 is 83246315115.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 51151364196 and 51151364205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51151364233) 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, 440820 + ... + 544632.

It is an arithmetic number, because the mean of its divisors is an integer number (3443458473).

Almost surely, 2^51151364238 is an apocalyptic number.

51151364238 is an abundant number, since it is smaller than the sum of its proper divisors (59039306898).

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

51151364238 is a wasteful number, since it uses less digits than its factorization.

51151364238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110148.

The product of its digits is 86400, while the sum is 39.

The spelling of 51151364238 in words is "fifty-one billion, one hundred fifty-one million, three hundred sixty-four thousand, two hundred thirty-eight".