55501622731 has 8 divisors (see below), whose sum is σ = 55549803600. Its totient is φ = 55453466880.

The previous prime is 55501622723. The next prime is 55501622749. The reversal of 55501622731 is 13722610555.

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

It is not a de Polignac number, because 55501622731 - 2³ = 55501622723 is a prime.

It is a super-2 number, since 2×55501622731² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55501622791) 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, 9064351 + ... + 9070471.

It is an arithmetic number, because the mean of its divisors is an integer number (6943725450).

Almost surely, 2^55501622731 is an apocalyptic number.

55501622731 is a deficient number, since it is larger than the sum of its proper divisors (48180869).

55501622731 is a wasteful number, since it uses less digits than its factorization.

55501622731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12509.

The product of its (nonzero) digits is 63000, while the sum is 37.

The spelling of 55501622731 in words is "fifty-five billion, five hundred one million, six hundred twenty-two thousand, seven hundred thirty-one".