55423031 has 8 divisors (see below), whose sum is σ = 59827680. Its totient is φ = 51184672.

The previous prime is 55423013. The next prime is 55423063. The reversal of 55423031 is 13032455.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55423031 - 2⁶ = 55422967 is a prime.

It is a super-2 number, since 2×55423031² = 6143424730453922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55422988 and 55423006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55473031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40880 + ... + 42213.

It is an arithmetic number, because the mean of its divisors is an integer number (7478460).

Almost surely, 2^55423031 is an apocalyptic number.

55423031 is a deficient number, since it is larger than the sum of its proper divisors (4404649).

55423031 is a wasteful number, since it uses less digits than its factorization.

55423031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83145.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 55423031 is about 7444.6645995639. The cubic root of 55423031 is about 381.2677671197.

Adding to 55423031 its reverse (13032455), we get a palindrome (68455486).

The spelling of 55423031 in words is "fifty-five million, four hundred twenty-three thousand, thirty-one".