55291392 has 180 divisors, whose sum is σ = 175227624. Its totient is φ = 16773120.

The previous prime is 55291351. The next prime is 55291403. The reversal of 55291392 is 29319255.

It is a happy number.

55291392 is a `hidden beast` number, since 552 + 9 + 13 + 92 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 778717 + ... + 778787.

Almost surely, 2^55291392 is an apocalyptic number.

55291392 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55291392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87613812).

55291392 is an abundant number, since it is smaller than the sum of its proper divisors (119936232).

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

55291392 is a wasteful number, since it uses less digits than its factorization.

55291392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121 (or 89 counting only the distinct ones).

The product of its digits is 24300, while the sum is 36.

The square root of 55291392 is about 7435.8181795953. The cubic root of 55291392 is about 380.9656695047.

The spelling of 55291392 in words is "fifty-five million, two hundred ninety-one thousand, three hundred ninety-two".