55142031 has 8 divisors (see below), whose sum is σ = 84025984. Its totient is φ = 31509720.

The previous prime is 55142023. The next prime is 55142051. The reversal of 55142031 is 13024155.

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

It is not a de Polignac number, because 55142031 - 2³ = 55142023 is a prime.

It is a super-2 number, since 2×55142031² = 6081287165609922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 2625811 = 55142031 / (5 + 5 + 1 + 4 + 2 + 0 + 3 + 1).

It is a junction number, because it is equal to n+sod(n) for n = 55141989 and 55142007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55142051) 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, 1312885 + ... + 1312926.

It is an arithmetic number, because the mean of its divisors is an integer number (10503248).

Almost surely, 2^55142031 is an apocalyptic number.

55142031 is a deficient number, since it is larger than the sum of its proper divisors (28883953).

55142031 is a wasteful number, since it uses less digits than its factorization.

55142031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2625821.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 55142031 is about 7425.7680410850. The cubic root of 55142031 is about 380.6223205368.

Adding to 55142031 its reverse (13024155), we get a palindrome (68166186).

The spelling of 55142031 in words is "fifty-five million, one hundred forty-two thousand, thirty-one".