551542225128 has 32 divisors (see below), whose sum is σ = 1388109636000. Its totient is φ = 182613531968.

The previous prime is 551542225127. The next prime is 551542225141. The reversal of 551542225128 is 821522245155.

It is a super-3 number, since 3×551542225128³ (a number of 36 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 551542225128.

It is not an unprimeable number, because it can be changed into a prime (551542225127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77113626 + ... + 77120777.

It is an arithmetic number, because the mean of its divisors is an integer number (43378426125).

Almost surely, 2^551542225128 is an apocalyptic number.

It is an amenable number.

551542225128 is an abundant number, since it is smaller than the sum of its proper divisors (836567410872).

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

551542225128 is a wasteful number, since it uses less digits than its factorization.

551542225128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154234561 (or 154234557 counting only the distinct ones).

The product of its digits is 320000, while the sum is 42.

The spelling of 551542225128 in words is "five hundred fifty-one billion, five hundred forty-two million, two hundred twenty-five thousand, one hundred twenty-eight".