51919012 has 12 divisors (see below), whose sum is σ = 92572956. Its totient is φ = 25469600.

The previous prime is 51918967. The next prime is 51919013. The reversal of 51919012 is 21091915.

It can be written as a sum of positive squares in 2 ways, for example, as 19838116 + 32080896 = 4454^2 + 5664^2 .

It is a super-2 number, since 2×51919012² = 5391167614112288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51919013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122239 + ... + 122662.

It is an arithmetic number, because the mean of its divisors is an integer number (7714413).

Almost surely, 2^51919012 is an apocalyptic number.

It is an amenable number.

51919012 is a deficient number, since it is larger than the sum of its proper divisors (40653944).

51919012 is a wasteful number, since it uses less digits than its factorization.

51919012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244958 (or 244956 counting only the distinct ones).

The product of its (nonzero) digits is 810, while the sum is 28.

The square root of 51919012 is about 7205.4848553029. The cubic root of 51919012 is about 373.0572402434.

The spelling of 51919012 in words is "fifty-one million, nine hundred nineteen thousand, twelve".