55215310 has 16 divisors (see below), whose sum is σ = 100413936. Its totient is φ = 21858048.

The previous prime is 55215299. The next prime is 55215319. The reversal of 55215310 is 1351255.

It is a super-2 number, since 2×55215310² = 6097460916792200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55215319) 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, 27492 + ... + 29431.

It is an arithmetic number, because the mean of its divisors is an integer number (6275871).

Almost surely, 2^55215310 is an apocalyptic number.

55215310 is a deficient number, since it is larger than the sum of its proper divisors (45198626).

55215310 is a wasteful number, since it uses less digits than its factorization.

55215310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57027.

The product of its (nonzero) digits is 750, while the sum is 22.

The square root of 55215310 is about 7430.7005053360. The cubic root of 55215310 is about 380.7908506426.

Adding to 55215310 its reverse (1351255), we get a palindrome (56566565).

The spelling of 55215310 in words is "fifty-five million, two hundred fifteen thousand, three hundred ten".