55731764 has 12 divisors (see below), whose sum is σ = 106397088. Its totient is φ = 25332600.

The previous prime is 55731743. The next prime is 55731839. The reversal of 55731764 is 46713755.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 633272 + ... + 633359.

It is an arithmetic number, because the mean of its divisors is an integer number (8866424).

Almost surely, 2^55731764 is an apocalyptic number.

It is an amenable number.

55731764 is a deficient number, since it is larger than the sum of its proper divisors (50665324).

55731764 is a wasteful number, since it uses less digits than its factorization.

55731764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1266646 (or 1266644 counting only the distinct ones).

The product of its digits is 88200, while the sum is 38.

The square root of 55731764 is about 7465.3709887721. The cubic root of 55731764 is about 381.9744050539.

Subtracting from 55731764 its reverse (46713755), we obtain a square (9018009 = 3003²).

It can be divided in two parts, 5573 and 1764, that added together give a palindrome (7337).

The spelling of 55731764 in words is "fifty-five million, seven hundred thirty-one thousand, seven hundred sixty-four".