54051531999 has 32 divisors (see below), whose sum is σ = 76121337600. Its totient is φ = 34065024000.

The previous prime is 54051531931. The next prime is 54051532021. The reversal of 54051531999 is 99913515045.

It is not a de Polignac number, because 54051531999 - 2¹² = 54051527903 is a prime.

It is a super-2 number, since 2×54051531999² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54051531929) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1267407 + ... + 1309359.

It is an arithmetic number, because the mean of its divisors is an integer number (2378791800).

Almost surely, 2^54051531999 is an apocalyptic number.

54051531999 is a gapful number since it is divisible by the number (59) formed by its first and last digit.

54051531999 is a deficient number, since it is larger than the sum of its proper divisors (22069805601).

54051531999 is a wasteful number, since it uses less digits than its factorization.

54051531999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42295.

The product of its (nonzero) digits is 1093500, while the sum is 51.

The spelling of 54051531999 in words is "fifty-four billion, fifty-one million, five hundred thirty-one thousand, nine hundred ninety-nine".