51937990 has 16 divisors (see below), whose sum is σ = 100680048. Its totient is φ = 19177056.

The previous prime is 51937987. The next prime is 51937999. The reversal of 51937990 is 9973915.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51937999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 199632 + ... + 199891.

It is an arithmetic number, because the mean of its divisors is an integer number (6292503).

Almost surely, 2^51937990 is an apocalyptic number.

51937990 is a deficient number, since it is larger than the sum of its proper divisors (48742058).

51937990 is a wasteful number, since it uses less digits than its factorization.

51937990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399543.

The product of its (nonzero) digits is 76545, while the sum is 43.

The square root of 51937990 is about 7206.8016484429. The cubic root of 51937990 is about 373.1026893481.

The spelling of 51937990 in words is "fifty-one million, nine hundred thirty-seven thousand, nine hundred ninety".