55031310 has 24 divisors (see below), whose sum is σ = 143081640. Its totient is φ = 14674992.

The previous prime is 55031309. The next prime is 55031311. The reversal of 55031310 is 1313055.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (55031309) and next prime (55031311).

It is a super-2 number, since 2×55031310² = 6056890160632200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55031311) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 305640 + ... + 305819.

It is an arithmetic number, because the mean of its divisors is an integer number (5961735).

Almost surely, 2^55031310 is an apocalyptic number.

55031310 is an abundant number, since it is smaller than the sum of its proper divisors (88050330).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55031310 is a wasteful number, since it uses less digits than its factorization.

55031310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 611472 (or 611469 counting only the distinct ones).

The product of its (nonzero) digits is 225, while the sum is 18.

The square root of 55031310 is about 7418.3091065283. The cubic root of 55031310 is about 380.3673962908.

Adding to 55031310 its reverse (1313055), we get a palindrome (56344365).

The spelling of 55031310 in words is "fifty-five million, thirty-one thousand, three hundred ten".