55982381 has 16 divisors (see below), whose sum is σ = 69595008. Its totient is φ = 43848000.

The previous prime is 55982357. The next prime is 55982387. The reversal of 55982381 is 18328955.

It is a de Polignac number, because none of the positive numbers 2^k-55982381 is a prime.

It is a super-2 number, since 2×55982381² = 6268053964858322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55982387) 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, 6146 + ... + 12236.

It is an arithmetic number, because the mean of its divisors is an integer number (4349688).

Almost surely, 2^55982381 is an apocalyptic number.

It is an amenable number.

55982381 is a deficient number, since it is larger than the sum of its proper divisors (13612627).

55982381 is a wasteful number, since it uses less digits than its factorization.

55982381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6212.

The product of its digits is 86400, while the sum is 41.

The square root of 55982381 is about 7482.1374619824. The cubic root of 55982381 is about 382.5461086142.

The spelling of 55982381 in words is "fifty-five million, nine hundred eighty-two thousand, three hundred eighty-one".