56121912 has 192 divisors, whose sum is σ = 194088960. Its totient is φ = 14227200.

The previous prime is 56121883. The next prime is 56121917. The reversal of 56121912 is 21912165.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56121917) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 293737 + ... + 293927.

It is an arithmetic number, because the mean of its divisors is an integer number (1010880).

Almost surely, 2^56121912 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56121912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97044480).

56121912 is an abundant number, since it is smaller than the sum of its proper divisors (137967048).

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

56121912 is a wasteful number, since it uses less digits than its factorization.

56121912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274 (or 267 counting only the distinct ones).

The product of its digits is 1080, while the sum is 27.

The square root of 56121912 is about 7491.4559332616. The cubic root of 56121912 is about 382.8636654099.

The spelling of 56121912 in words is "fifty-six million, one hundred twenty-one thousand, nine hundred twelve".