51590481 has 4 divisors (see below), whose sum is σ = 68787312. Its totient is φ = 34393652.

The previous prime is 51590477. The next prime is 51590521. The reversal of 51590481 is 18409515.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51590481 - 2² = 51590477 is a prime.

It is a super-2 number, since 2×51590481² = 5323155459622722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51590401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8598411 + ... + 8598416.

It is an arithmetic number, because the mean of its divisors is an integer number (17196828).

Almost surely, 2^51590481 is an apocalyptic number.

It is an amenable number.

51590481 is a deficient number, since it is larger than the sum of its proper divisors (17196831).

51590481 is a wasteful number, since it uses less digits than its factorization.

51590481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17196830.

The product of its (nonzero) digits is 7200, while the sum is 33.

The square root of 51590481 is about 7182.6513906774. The cubic root of 51590481 is about 372.2687025576.

Adding to 51590481 its reverse (18409515), we get a palindrome (69999996).

The spelling of 51590481 in words is "fifty-one million, five hundred ninety thousand, four hundred eighty-one".