551255552442 has 48 divisors (see below), whose sum is σ = 1368733247232. Its totient is φ = 157072413600.

The previous prime is 551255552429. The next prime is 551255552443. The reversal of 551255552442 is 244255552155.

551255552442 is a `hidden beast` number, since 5 + 5 + 1 + 2 + 55 + 552 + 4 + 42 = 666.

It is a super-2 number, since 2×551255552442² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (551255552443) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5914309 + ... + 6006792.

It is an arithmetic number, because the mean of its divisors is an integer number (28515275984).

Almost surely, 2^551255552442 is an apocalyptic number.

551255552442 is an abundant number, since it is smaller than the sum of its proper divisors (817477694790).

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

551255552442 is a wasteful number, since it uses less digits than its factorization.

551255552442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11921483 (or 11921480 counting only the distinct ones).

The product of its digits is 2000000, while the sum is 45.

The spelling of 551255552442 in words is "five hundred fifty-one billion, two hundred fifty-five million, five hundred fifty-two thousand, four hundred forty-two".