55220810 has 16 divisors (see below), whose sum is σ = 99872352. Its totient is φ = 21982800.

The previous prime is 55220791. The next prime is 55220833. The reversal of 55220810 is 1802255.

It is a super-2 number, since 2×55220810² = 6098675714112200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10976 + ... + 15195.

It is an arithmetic number, because the mean of its divisors is an integer number (6242022).

Almost surely, 2^55220810 is an apocalyptic number.

55220810 is a deficient number, since it is larger than the sum of its proper divisors (44651542).

55220810 is a wasteful number, since it uses less digits than its factorization.

55220810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26389.

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 55220810 is about 7431.0705823589. The cubic root of 55220810 is about 380.8034937552.

The spelling of 55220810 in words is "fifty-five million, two hundred twenty thousand, eight hundred ten".