55120706731 has 4 divisors (see below), whose sum is σ = 55124104464. Its totient is φ = 55117309000.

The previous prime is 55120706681. The next prime is 55120706737. The reversal of 55120706731 is 13760702155.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13760702155 = 5 ⋅2752140431.

It is a cyclic number.

It is not a de Polignac number, because 55120706731 - 2¹⁵ = 55120673963 is a prime.

It is a super-2 number, since 2×55120706731² (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 (55120706737) 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, 1674415 + ... + 1707016.

It is an arithmetic number, because the mean of its divisors is an integer number (13781026116).

Almost surely, 2^55120706731 is an apocalyptic number.

55120706731 is a deficient number, since it is larger than the sum of its proper divisors (3397733).

55120706731 is a wasteful number, since it uses less digits than its factorization.

55120706731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3397732.

The product of its (nonzero) digits is 44100, while the sum is 37.

The spelling of 55120706731 in words is "fifty-five billion, one hundred twenty million, seven hundred six thousand, seven hundred thirty-one".