55200381 has 16 divisors (see below), whose sum is σ = 75398400. Its totient is φ = 35912448.

The previous prime is 55200373. The next prime is 55200389. The reversal of 55200381 is 18300255.

It is an interprime number because it is at equal distance from previous prime (55200373) and next prime (55200389).

It is not a de Polignac number, because 55200381 - 2³ = 55200373 is a prime.

It is a super-2 number, since 2×55200381² = 6094164125090322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55200389) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19785 + ... + 22401.

It is an arithmetic number, because the mean of its divisors is an integer number (4712400).

Almost surely, 2^55200381 is an apocalyptic number.

It is an amenable number.

55200381 is a deficient number, since it is larger than the sum of its proper divisors (20198019).

55200381 is a wasteful number, since it uses less digits than its factorization.

55200381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2788.

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 55200381 is about 7429.6958887965. The cubic root of 55200381 is about 380.7565284046.

The spelling of 55200381 in words is "fifty-five million, two hundred thousand, three hundred eighty-one".