55731478 has 16 divisors (see below), whose sum is σ = 91561104. Its totient is φ = 25231360.

The previous prime is 55731449. The next prime is 55731523. The reversal of 55731478 is 87413755.

It is a self number, because there is not a number n which added to its sum of digits gives 55731478.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 726 + ... + 10582.

It is an arithmetic number, because the mean of its divisors is an integer number (5722569).

Almost surely, 2^55731478 is an apocalyptic number.

55731478 is a deficient number, since it is larger than the sum of its proper divisors (35829626).

55731478 is a wasteful number, since it uses less digits than its factorization.

55731478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10127.

The product of its digits is 117600, while the sum is 40.

The square root of 55731478 is about 7465.3518336378. The cubic root of 55731478 is about 381.9737516571.

The spelling of 55731478 in words is "fifty-five million, seven hundred thirty-one thousand, four hundred seventy-eight".