55422381 has 24 divisors (see below), whose sum is σ = 86477664. Its totient is φ = 31479840.

The previous prime is 55422379. The next prime is 55422407. The reversal of 55422381 is 18322455.

It is not a de Polignac number, because 55422381 - 2¹ = 55422379 is a prime.

It is a super-2 number, since 2×55422381² = 6143280631418322, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55422331) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25566 + ... + 27648.

It is an arithmetic number, because the mean of its divisors is an integer number (3603236).

Almost surely, 2^55422381 is an apocalyptic number.

It is an amenable number.

55422381 is a deficient number, since it is larger than the sum of its proper divisors (31055283).

55422381 is a wasteful number, since it uses less digits than its factorization.

55422381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2281 (or 2274 counting only the distinct ones).

The product of its digits is 9600, while the sum is 30.

The square root of 55422381 is about 7444.6209440105. The cubic root of 55422381 is about 381.2662766141.

The spelling of 55422381 in words is "fifty-five million, four hundred twenty-two thousand, three hundred eighty-one".