55738731 has 4 divisors (see below), whose sum is σ = 74318312. Its totient is φ = 37159152.

The previous prime is 55738717. The next prime is 55738751. The reversal of 55738731 is 13783755.

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

It is not a de Polignac number, because 55738731 - 2⁷ = 55738603 is a prime.

It is a super-2 number, since 2×55738731² = 6213612266980722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55738731.

It is not an unprimeable number, because it can be changed into a prime (55738751) 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, 9289786 + ... + 9289791.

It is an arithmetic number, because the mean of its divisors is an integer number (18579578).

Almost surely, 2^55738731 is an apocalyptic number.

55738731 is a deficient number, since it is larger than the sum of its proper divisors (18579581).

55738731 is a wasteful number, since it uses less digits than its factorization.

55738731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18579580.

The product of its digits is 88200, while the sum is 39.

The square root of 55738731 is about 7465.8375953405. The cubic root of 55738731 is about 381.9903212006.

The spelling of 55738731 in words is "fifty-five million, seven hundred thirty-eight thousand, seven hundred thirty-one".