55290232 has 8 divisors (see below), whose sum is σ = 103669200. Its totient is φ = 27645112.

The previous prime is 55290223. The next prime is 55290241. The reversal of 55290232 is 23209255.

It is an interprime number because it is at equal distance from previous prime (55290223) and next prime (55290241).

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×55290232² = 6114019509227648, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 55290232.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3455632 + ... + 3455647.

It is an arithmetic number, because the mean of its divisors is an integer number (12958650).

Almost surely, 2^55290232 is an apocalyptic number.

It is an amenable number.

55290232 is a deficient number, since it is larger than the sum of its proper divisors (48378968).

55290232 is a wasteful number, since it uses less digits than its factorization.

55290232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6911285 (or 6911281 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 55290232 is about 7435.7401783548. The cubic root of 55290232 is about 380.9630052969.

Adding to 55290232 its reverse (23209255), we get a palindrome (78499487).

The spelling of 55290232 in words is "fifty-five million, two hundred ninety thousand, two hundred thirty-two".