55731023 has 4 divisors (see below), whose sum is σ = 55750128. Its totient is φ = 55711920.

The previous prime is 55731019. The next prime is 55731041. The reversal of 55731023 is 32013755.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32013755 = 5 ⋅6402751.

It is a cyclic number.

It is not a de Polignac number, because 55731023 - 2² = 55731019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55730983 and 55731001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55731523) 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, 4163 + ... + 11348.

It is an arithmetic number, because the mean of its divisors is an integer number (13937532).

Almost surely, 2^55731023 is an apocalyptic number.

55731023 is a deficient number, since it is larger than the sum of its proper divisors (19105).

55731023 is a wasteful number, since it uses less digits than its factorization.

55731023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19104.

The product of its (nonzero) digits is 3150, while the sum is 26.

The square root of 55731023 is about 7465.3213594594. The cubic root of 55731023 is about 381.9727121576.

Adding to 55731023 its reverse (32013755), we get a palindrome (87744778).

The spelling of 55731023 in words is "fifty-five million, seven hundred thirty-one thousand, twenty-three".