54688731 has 4 divisors (see below), whose sum is σ = 72918312. Its totient is φ = 36459152.

The previous prime is 54688729. The next prime is 54688747. The reversal of 54688731 is 13788645.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 54688731 - 2¹ = 54688729 is a prime.

It is a super-2 number, since 2×54688731² = 5981714596780722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (54688721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9114786 + ... + 9114791.

It is an arithmetic number, because the mean of its divisors is an integer number (18229578).

Almost surely, 2^54688731 is an apocalyptic number.

54688731 is a deficient number, since it is larger than the sum of its proper divisors (18229581).

54688731 is a wasteful number, since it uses less digits than its factorization.

54688731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18229580.

The product of its digits is 161280, while the sum is 42.

The square root of 54688731 is about 7395.1829591972. The cubic root of 54688731 is about 379.5764694943.

The spelling of 54688731 in words is "fifty-four million, six hundred eighty-eight thousand, seven hundred thirty-one".