55123156031 has 4 divisors (see below), whose sum is σ = 55128229200. Its totient is φ = 55118082864.

The previous prime is 55123156027. The next prime is 55123156037. The reversal of 55123156031 is 13065132155.

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 55123156031 - 2² = 55123156027 is a prime.

It is a super-3 number, since 3×55123156031³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55123156037) 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, 2520251 + ... + 2542028.

It is an arithmetic number, because the mean of its divisors is an integer number (13782057300).

Almost surely, 2^55123156031 is an apocalyptic number.

55123156031 is a deficient number, since it is larger than the sum of its proper divisors (5073169).

55123156031 is a wasteful number, since it uses less digits than its factorization.

55123156031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5073168.

The product of its (nonzero) digits is 13500, while the sum is 32.

Adding to 55123156031 its reverse (13065132155), we get a palindrome (68188288186).

The spelling of 55123156031 in words is "fifty-five billion, one hundred twenty-three million, one hundred fifty-six thousand, thirty-one".