51965442 has 32 divisors (see below), whose sum is σ = 116261760. Its totient is φ = 17204400.

The previous prime is 51965383. The next prime is 51965449. The reversal of 51965442 is 24456915.

It is a junction number, because it is equal to n+sod(n) for n = 51965397 and 51965406.

It is not an unprimeable number, because it can be changed into a prime (51965449) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 4968 + ... + 11340.

It is an arithmetic number, because the mean of its divisors is an integer number (3633180).

Almost surely, 2^51965442 is an apocalyptic number.

51965442 is an abundant number, since it is smaller than the sum of its proper divisors (64296318).

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

51965442 is a wasteful number, since it uses less digits than its factorization.

51965442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6535 (or 6529 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 51965442 is about 7208.7059865138. The cubic root of 51965442 is about 373.1684126655.

The spelling of 51965442 in words is "fifty-one million, nine hundred sixty-five thousand, four hundred forty-two".