51115356 has 36 divisors (see below), whose sum is σ = 132363504. Its totient is φ = 16622400.

The previous prime is 51115331. The next prime is 51115357. The reversal of 51115356 is 65351115.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×51115356² = 5225559238013472, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51115357) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15840 + ... + 18791.

It is an arithmetic number, because the mean of its divisors is an integer number (3676764).

Almost surely, 2^51115356 is an apocalyptic number.

It is an amenable number.

51115356 is an abundant number, since it is smaller than the sum of its proper divisors (81248148).

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

51115356 is a wasteful number, since it uses less digits than its factorization.

51115356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34682 (or 34677 counting only the distinct ones).

The product of its digits is 2250, while the sum is 27.

The square root of 51115356 is about 7149.5004021260. The cubic root of 51115356 is about 371.1223674446.

The spelling of 51115356 in words is "fifty-one million, one hundred fifteen thousand, three hundred fifty-six".