51942940 has 36 divisors (see below), whose sum is σ = 126891576. Its totient is φ = 17808672.

The previous prime is 51942911. The next prime is 51942991. The reversal of 51942940 is 4924915.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 51942896 and 51942905.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25522 + ... + 27481.

It is an arithmetic number, because the mean of its divisors is an integer number (3524766).

Almost surely, 2^51942940 is an apocalyptic number.

It is an amenable number.

51942940 is an abundant number, since it is smaller than the sum of its proper divisors (74948636).

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

51942940 is a wasteful number, since it uses less digits than its factorization.

51942940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53026 (or 53017 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 51942940 is about 7207.1450658357. The cubic root of 51942940 is about 373.1145419416.

The spelling of 51942940 in words is "fifty-one million, nine hundred forty-two thousand, nine hundred forty".