55521342 has 32 divisors (see below), whose sum is σ = 126255360. Its totient is φ = 18075960.

The previous prime is 55521317. The next prime is 55521343. The reversal of 55521342 is 24312555.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55521343) 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, 9634 + ... + 14277.

It is an arithmetic number, because the mean of its divisors is an integer number (3945480).

Almost surely, 2^55521342 is an apocalyptic number.

55521342 is an abundant number, since it is smaller than the sum of its proper divisors (70734018).

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

55521342 is a wasteful number, since it uses less digits than its factorization.

55521342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23965 (or 23959 counting only the distinct ones).

The product of its digits is 6000, while the sum is 27.

The square root of 55521342 is about 7451.2644564530. The cubic root of 55521342 is about 381.4930686107.

Adding to 55521342 its reverse (24312555), we get a palindrome (79833897).

The spelling of 55521342 in words is "fifty-five million, five hundred twenty-one thousand, three hundred forty-two".