55515423451531 has 8 divisors (see below), whose sum is σ = 56697295118400. Its totient is φ = 54333580636608.

The previous prime is 55515423451471. The next prime is 55515423451541. The reversal of 55515423451531 is 13515432451555.

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 55515423451531 - 2¹⁷ = 55515423320459 is a prime.

It is a super-2 number, since 2×55515423451531² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55515423451541) 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, 3301386 + ... + 11042191.

It is an arithmetic number, because the mean of its divisors is an integer number (7087161889800).

Almost surely, 2^{55515423451531} is an apocalyptic number.

55515423451531 is a deficient number, since it is larger than the sum of its proper divisors (1181871666869).

55515423451531 is a wasteful number, since it uses less digits than its factorization.

55515423451531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14425973.

The product of its digits is 4500000, while the sum is 49.

The spelling of 55515423451531 in words is "fifty-five trillion, five hundred fifteen billion, four hundred twenty-three million, four hundred fifty-one thousand, five hundred thirty-one".