61590531 has 4 divisors (see below), whose sum is σ = 82120712. Its totient is φ = 41060352.

The previous prime is 61590523. The next prime is 61590547. The reversal of 61590531 is 13509516.

61590531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 61590531 - 2³ = 61590523 is a prime.

It is a super-2 number, since 2×61590531² = 7586787017723922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61590931) 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 3 ways as a sum of consecutive naturals, for example, 10265086 + ... + 10265091.

It is an arithmetic number, because the mean of its divisors is an integer number (20530178).

Almost surely, 2^61590531 is an apocalyptic number.

61590531 is a deficient number, since it is larger than the sum of its proper divisors (20530181).

61590531 is a wasteful number, since it uses less digits than its factorization.

61590531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20530180.

The product of its (nonzero) digits is 4050, while the sum is 30.

The square root of 61590531 is about 7847.9634937989. The cubic root of 61590531 is about 394.9159272013.

The spelling of 61590531 in words is "sixty-one million, five hundred ninety thousand, five hundred thirty-one".