51939958 has 48 divisors (see below), whose sum is σ = 96560640. Its totient is φ = 20511792.

The previous prime is 51939929. The next prime is 51939959. The reversal of 51939958 is 85993915.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51939959) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 217203 + ... + 217441.

It is an arithmetic number, because the mean of its divisors is an integer number (2011680).

Almost surely, 2^51939958 is an apocalyptic number.

51939958 is a deficient number, since it is larger than the sum of its proper divisors (44620682).

51939958 is a wasteful number, since it uses less digits than its factorization.

51939958 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329 (or 310 counting only the distinct ones).

The product of its digits is 437400, while the sum is 49.

The square root of 51939958 is about 7206.9381848327. The cubic root of 51939958 is about 373.1074017421.

It can be divided in two parts, 5193 and 9958, that added together give a palindrome (15151).

The spelling of 51939958 in words is "fifty-one million, nine hundred thirty-nine thousand, nine hundred fifty-eight".