51992590 has 64 divisors (see below), whose sum is σ = 105380352. Its totient is φ = 18345600.

The previous prime is 51992561. The next prime is 51992593. The reversal of 51992590 is 9529915.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51992593) 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 31 ways as a sum of consecutive naturals, for example, 396825 + ... + 396955.

It is an arithmetic number, because the mean of its divisors is an integer number (1646568).

Almost surely, 2^51992590 is an apocalyptic number.

51992590 is an abundant number, since it is smaller than the sum of its proper divisors (53387762).

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

51992590 is a wasteful number, since it uses less digits than its factorization.

51992590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265.

The product of its (nonzero) digits is 36450, while the sum is 40.

The square root of 51992590 is about 7210.5887415661. The cubic root of 51992590 is about 373.2333854115.

The spelling of 51992590 in words is "fifty-one million, nine hundred ninety-two thousand, five hundred ninety".