55787226 has 16 divisors (see below), whose sum is σ = 121717728. Its totient is φ = 16905200.

The previous prime is 55787219. The next prime is 55787243. The reversal of 55787226 is 62278755.

It is a super-2 number, since 2×55787226² = 6224429169550152, 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, 422565 + ... + 422696.

It is an arithmetic number, because the mean of its divisors is an integer number (7607358).

Almost surely, 2^55787226 is an apocalyptic number.

55787226 is an abundant number, since it is smaller than the sum of its proper divisors (65930502).

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

55787226 is a wasteful number, since it uses less digits than its factorization.

55787226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 845277.

The product of its digits is 235200, while the sum is 42.

The square root of 55787226 is about 7469.0846828778. The cubic root of 55787226 is about 382.1010715442.

The spelling of 55787226 in words is "fifty-five million, seven hundred eighty-seven thousand, two hundred twenty-six".