5231655561 has 8 divisors (see below), whose sum is σ = 7609680864. Its totient is φ = 3170700320.

The previous prime is 5231655553. The next prime is 5231655571. The reversal of 5231655561 is 1655561325.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 5231655561 - 2³ = 5231655553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5231655551) 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, 79267476 + ... + 79267541.

It is an arithmetic number, because the mean of its divisors is an integer number (951210108).

Almost surely, 2^5231655561 is an apocalyptic number.

It is an amenable number.

5231655561 is a deficient number, since it is larger than the sum of its proper divisors (2378025303).

5231655561 is a wasteful number, since it uses less digits than its factorization.

5231655561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158535031.

The product of its digits is 135000, while the sum is 39.

The square root of 5231655561 is about 72330.1843008851. The cubic root of 5231655561 is about 1735.9866502872.

It can be divided in two parts, 52 and 31655561, that added together give a palindrome (31655613).

The spelling of 5231655561 in words is "five billion, two hundred thirty-one million, six hundred fifty-five thousand, five hundred sixty-one".