55519031 has 4 divisors (see below), whose sum is σ = 55584672. Its totient is φ = 55453392.

The previous prime is 55519027. The next prime is 55519049. The reversal of 55519031 is 13091555.

It is a happy number.

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 55519031 - 2² = 55519027 is a prime.

It is a super-2 number, since 2×55519031² = 6164725606357922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55518985 and 55519003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55519091) 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, 31535 + ... + 33248.

It is an arithmetic number, because the mean of its divisors is an integer number (13896168).

Almost surely, 2^55519031 is an apocalyptic number.

55519031 is a deficient number, since it is larger than the sum of its proper divisors (65641).

55519031 is an equidigital number, since it uses as much as digits as its factorization.

55519031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65640.

The product of its (nonzero) digits is 3375, while the sum is 29.

The square root of 55519031 is about 7451.1093804883. The cubic root of 55519031 is about 381.4877754947.

The spelling of 55519031 in words is "fifty-five million, five hundred nineteen thousand, thirty-one".