55297930 has 16 divisors (see below), whose sum is σ = 101964744. Its totient is φ = 21579520.

The previous prime is 55297909. The next prime is 55297939. The reversal of 55297930 is 3979255.

It can be written as a sum of positive squares in 4 ways, for example, as 27133681 + 28164249 = 5209^2 + 5307^2 .

It is a super-2 number, since 2×55297930² = 6115722124569800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55297939) 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, 67027 + ... + 67846.

Almost surely, 2^55297930 is an apocalyptic number.

55297930 is a deficient number, since it is larger than the sum of its proper divisors (46666814).

55297930 is a wasteful number, since it uses less digits than its factorization.

55297930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134921.

The product of its (nonzero) digits is 85050, while the sum is 40.

The square root of 55297930 is about 7436.2577954237. The cubic root of 55297930 is about 380.9806848340.

The spelling of 55297930 in words is "fifty-five million, two hundred ninety-seven thousand, nine hundred thirty".