55521942 has 16 divisors (see below), whose sum is σ = 126907392. Its totient is φ = 15863400.

The previous prime is 55521923. The next prime is 55521943. The reversal of 55521942 is 24912555.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55521943) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 660934 + ... + 661017.

It is an arithmetic number, because the mean of its divisors is an integer number (7931712).

Almost surely, 2^55521942 is an apocalyptic number.

55521942 is an abundant number, since it is smaller than the sum of its proper divisors (71385450).

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

55521942 is a wasteful number, since it uses less digits than its factorization.

55521942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1321963.

The product of its digits is 18000, while the sum is 33.

The square root of 55521942 is about 7451.3047179672. The cubic root of 55521942 is about 381.4944428271.

The spelling of 55521942 in words is "fifty-five million, five hundred twenty-one thousand, nine hundred forty-two".