51156120 has 32 divisors (see below), whose sum is σ = 153468720. Its totient is φ = 13641600.

The previous prime is 51156109. The next prime is 51156121. The reversal of 51156120 is 2165115.

It is a super-2 number, since 2×51156120² = 5233897226908800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51156121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 213031 + ... + 213270.

Almost surely, 2^51156120 is an apocalyptic number.

It is an amenable number.

51156120 is an abundant number, since it is smaller than the sum of its proper divisors (102312600).

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

51156120 is a wasteful number, since it uses less digits than its factorization.

51156120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426315 (or 426311 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 21.

The square root of 51156120 is about 7152.3506625444. The cubic root of 51156120 is about 371.2209967253.

The spelling of 51156120 in words is "fifty-one million, one hundred fifty-six thousand, one hundred twenty".