55691982 has 32 divisors (see below), whose sum is σ = 124567200. Its totient is φ = 18442944.

The previous prime is 55691959. The next prime is 55691989. The reversal of 55691982 is 28919655.

55691982 is a `hidden beast` number, since 5 + 569 + 1 + 9 + 82 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55691989) 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, 5194 + ... + 11762.

It is an arithmetic number, because the mean of its divisors is an integer number (3892725).

Almost surely, 2^55691982 is an apocalyptic number.

55691982 is an abundant number, since it is smaller than the sum of its proper divisors (68875218).

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

55691982 is a wasteful number, since it uses less digits than its factorization.

55691982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6737 (or 6731 counting only the distinct ones).

The product of its digits is 194400, while the sum is 45.

The square root of 55691982 is about 7462.7060775566. The cubic root of 55691982 is about 381.8834974532.

The spelling of 55691982 in words is "fifty-five million, six hundred ninety-one thousand, nine hundred eighty-two".