55555001242 has 48 divisors (see below), whose sum is σ = 93522457440. Its totient is φ = 24710177856.

The previous prime is 55555001237. The next prime is 55555001287. The reversal of 55555001242 is 24210055555.

It is a junction number, because it is equal to n+sod(n) for n = 55555001198 and 55555001207.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5513493 + ... + 5523559.

It is an arithmetic number, because the mean of its divisors is an integer number (1948384530).

Almost surely, 2^55555001242 is an apocalyptic number.

55555001242 is a deficient number, since it is larger than the sum of its proper divisors (37967456198).

55555001242 is a wasteful number, since it uses less digits than its factorization.

55555001242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10687 (or 10674 counting only the distinct ones).

The product of its (nonzero) digits is 50000, while the sum is 34.

Adding to 55555001242 its reverse (24210055555), we get a palindrome (79765056797).

The spelling of 55555001242 in words is "fifty-five billion, five hundred fifty-five million, one thousand, two hundred forty-two".