55521531242 has 8 divisors (see below), whose sum is σ = 88181255556. Its totient is φ = 26127779392.

The previous prime is 55521531139. The next prime is 55521531271. The reversal of 55521531242 is 24213512555.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 45497316601 + 10024214641 = 213301^2 + 100121^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 816493073 + ... + 816493140.

Almost surely, 2^55521531242 is an apocalyptic number.

55521531242 is a deficient number, since it is larger than the sum of its proper divisors (32659724314).

55521531242 is a wasteful number, since it uses less digits than its factorization.

55521531242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1632986232.

The product of its digits is 60000, while the sum is 35.

The spelling of 55521531242 in words is "fifty-five billion, five hundred twenty-one million, five hundred thirty-one thousand, two hundred forty-two".