55521215042 has 16 divisors (see below), whose sum is σ = 88188869880. Its totient is φ = 26125225728.

The previous prime is 55521214993. The next prime is 55521215051. The reversal of 55521215042 is 24051212555.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 35363178601 + 20158036441 = 188051^2 + 141979^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 331568 + ... + 470084.

Almost surely, 2^55521215042 is an apocalyptic number.

55521215042 is a deficient number, since it is larger than the sum of its proper divisors (32667654838).

55521215042 is a wasteful number, since it uses less digits than its factorization.

55521215042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150325.

The product of its (nonzero) digits is 20000, while the sum is 32.

Adding to 55521215042 its reverse (24051212555), we get a palindrome (79572427597).

The spelling of 55521215042 in words is "fifty-five billion, five hundred twenty-one million, two hundred fifteen thousand, forty-two".