55312563731 has 4 divisors (see below), whose sum is σ = 55313983632. Its totient is φ = 55311143832.

The previous prime is 55312563701. The next prime is 55312563743. The reversal of 55312563731 is 13736521355.

It is a happy number.

55312563731 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 55312563731 - 2⁶ = 55312563667 is a prime.

It is a super-2 number, since 2×55312563731² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55312563701) 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, 649820 + ... + 729993.

It is an arithmetic number, because the mean of its divisors is an integer number (13828495908).

Almost surely, 2^55312563731 is an apocalyptic number.

55312563731 is a deficient number, since it is larger than the sum of its proper divisors (1419901).

55312563731 is a wasteful number, since it uses less digits than its factorization.

55312563731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1419900.

The product of its digits is 283500, while the sum is 41.

The spelling of 55312563731 in words is "fifty-five billion, three hundred twelve million, five hundred sixty-three thousand, seven hundred thirty-one".