51154431344120 has 64 divisors (see below), whose sum is σ = 124483101462720. Its totient is φ = 18806726513664.

The previous prime is 51154431344063. The next prime is 51154431344147. The reversal of 51154431344120 is 2144313445115.

It is a super-2 number, since 2×51154431344120² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 210981644 + ... + 211223963.

It is an arithmetic number, because the mean of its divisors is an integer number (1945048460355).

Almost surely, 2^{51154431344120} is an apocalyptic number.

It is an amenable number.

51154431344120 is an abundant number, since it is smaller than the sum of its proper divisors (73328670118600).

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

51154431344120 is a wasteful number, since it uses less digits than its factorization.

51154431344120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422205864 (or 422205860 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 38.

Adding to 51154431344120 its reverse (2144313445115), we get a palindrome (53298744789235).

The spelling of 51154431344120 in words is "fifty-one trillion, one hundred fifty-four billion, four hundred thirty-one million, three hundred forty-four thousand, one hundred twenty".