54261215231531 has 12 divisors (see below), whose sum is σ = 68858388160920. Its totient is φ = 42281466413760.

The previous prime is 54261215231471. The next prime is 54261215231557. The reversal of 54261215231531 is 13513251216245.

It is not a de Polignac number, because 54261215231531 - 2¹⁴ = 54261215215147 is a prime.

It is a super-2 number, since 2×54261215231531² (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 (54261215231131) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50335078526 + ... + 50335079603.

It is an arithmetic number, because the mean of its divisors is an integer number (5738199013410).

Almost surely, 2^{54261215231531} is an apocalyptic number.

54261215231531 is a deficient number, since it is larger than the sum of its proper divisors (14597172929389).

54261215231531 is a wasteful number, since it uses less digits than its factorization.

54261215231531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100670158154 (or 100670158147 counting only the distinct ones).

The product of its digits is 216000, while the sum is 41.

Adding to 54261215231531 its reverse (13513251216245), we get a palindrome (67774466447776).

The spelling of 54261215231531 in words is "fifty-four trillion, two hundred sixty-one billion, two hundred fifteen million, two hundred thirty-one thousand, five hundred thirty-one".