51537590 has 16 divisors (see below), whose sum is σ = 99903888. Its totient is φ = 19029216.

The previous prime is 51537589. The next prime is 51537599. The reversal of 51537590 is 9573515.

51537590 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×51537590² = 5312246366016200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51537590.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51537599) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 198092 + ... + 198351.

It is an arithmetic number, because the mean of its divisors is an integer number (6243993).

Almost surely, 2^51537590 is an apocalyptic number.

51537590 is a deficient number, since it is larger than the sum of its proper divisors (48366298).

51537590 is a wasteful number, since it uses less digits than its factorization.

51537590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396463.

The product of its (nonzero) digits is 23625, while the sum is 35.

The square root of 51537590 is about 7178.9685888712. The cubic root of 51537590 is about 372.1414413777.

The spelling of 51537590 in words is "fifty-one million, five hundred thirty-seven thousand, five hundred ninety".