55420232 has 16 divisors (see below), whose sum is σ = 118757760. Its totient is φ = 23751504.

The previous prime is 55420229. The next prime is 55420241. The reversal of 55420232 is 23202455.

It is a super-2 number, since 2×55420232² = 6142804229867648, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55420198 and 55420207.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 494768 + ... + 494879.

It is an arithmetic number, because the mean of its divisors is an integer number (7422360).

Almost surely, 2^55420232 is an apocalyptic number.

It is an amenable number.

55420232 is an abundant number, since it is smaller than the sum of its proper divisors (63337528).

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

55420232 is a wasteful number, since it uses less digits than its factorization.

55420232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 989660 (or 989656 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 23.

The square root of 55420232 is about 7444.4766102124. The cubic root of 55420232 is about 381.2613486902.

Adding to 55420232 its reverse (23202455), we get a palindrome (78622687).

The spelling of 55420232 in words is "fifty-five million, four hundred twenty thousand, two hundred thirty-two".