55031015 has 16 divisors (see below), whose sum is σ = 71321376. Its totient is φ = 40521600.

The previous prime is 55030991. The next prime is 55031017. The reversal of 55031015 is 51013055.

It is a happy number.

It is not a de Polignac number, because 55031015 - 2²⁴ = 38253799 is a prime.

It is a super-2 number, since 2×55031015² = 6056825223860450, which contains 22 as substring.

It is a Smith number, since the sum of its digits (20) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55031017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26360 + ... + 28370.

It is an arithmetic number, because the mean of its divisors is an integer number (4457586).

Almost surely, 2^55031015 is an apocalyptic number.

55031015 is a deficient number, since it is larger than the sum of its proper divisors (16290361).

55031015 is a wasteful number, since it uses less digits than its factorization.

55031015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2450.

The product of its (nonzero) digits is 375, while the sum is 20.

The square root of 55031015 is about 7418.2892232644. The cubic root of 55031015 is about 380.3667166257.

The spelling of 55031015 in words is "fifty-five million, thirty-one thousand, fifteen".