55640226 has 32 divisors (see below), whose sum is σ = 115315200. Its totient is φ = 17879040.

The previous prime is 55640209. The next prime is 55640251. The reversal of 55640226 is 62204655.

It is a junction number, because it is equal to n+sod(n) for n = 55640193 and 55640202.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71970 + ... + 72738.

It is an arithmetic number, because the mean of its divisors is an integer number (3603600).

Almost surely, 2^55640226 is an apocalyptic number.

55640226 is an abundant number, since it is smaller than the sum of its proper divisors (59674974).

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

55640226 is a wasteful number, since it uses less digits than its factorization.

55640226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1194.

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 55640226 is about 7459.2376286052. The cubic root of 55640226 is about 381.7651627165.

The spelling of 55640226 in words is "fifty-five million, six hundred forty thousand, two hundred twenty-six".