55722042 has 24 divisors (see below), whose sum is σ = 121605120. Its totient is φ = 18439560.

The previous prime is 55721959. The next prime is 55722047. The reversal of 55722042 is 24022755.

It is a junction number, because it is equal to n+sod(n) for n = 55721997 and 55722015.

It is not an unprimeable number, because it can be changed into a prime (55722047) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8634 + ... + 13637.

It is an arithmetic number, because the mean of its divisors is an integer number (5066880).

Almost surely, 2^55722042 is an apocalyptic number.

55722042 is an abundant number, since it is smaller than the sum of its proper divisors (65883078).

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

55722042 is a wasteful number, since it uses less digits than its factorization.

55722042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22418 (or 22415 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 27.

The square root of 55722042 is about 7464.7198205961. The cubic root of 55722042 is about 381.9521928787.

Adding to 55722042 its reverse (24022755), we get a palindrome (79744797).

The spelling of 55722042 in words is "fifty-five million, seven hundred twenty-two thousand, forty-two".