51937890 has 32 divisors (see below), whose sum is σ = 131984640. Its totient is φ = 13035264.

The previous prime is 51937883. The next prime is 51937891. The reversal of 51937890 is 9873915.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (51937891) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50410 + ... + 51429.

It is an arithmetic number, because the mean of its divisors is an integer number (4124520).

Almost surely, 2^51937890 is an apocalyptic number.

51937890 is an abundant number, since it is smaller than the sum of its proper divisors (80046750).

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

51937890 is a wasteful number, since it uses less digits than its factorization.

51937890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101866.

The product of its (nonzero) digits is 68040, while the sum is 42.

The square root of 51937890 is about 7206.7947105492. The cubic root of 51937890 is about 373.1024498940.

The spelling of 51937890 in words is "fifty-one million, nine hundred thirty-seven thousand, eight hundred ninety".