551211402252 has 96 divisors (see below), whose sum is σ = 1478787932160. Its totient is φ = 156537722880.

The previous prime is 551211402241. The next prime is 551211402253. The reversal of 551211402252 is 252204112155.

It is not an unprimeable number, because it can be changed into a prime (551211402253) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20795824 + ... + 20822312.

It is an arithmetic number, because the mean of its divisors is an integer number (15404040960).

Almost surely, 2^551211402252 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 551211402252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (739393966080).

551211402252 is an abundant number, since it is smaller than the sum of its proper divisors (927576529908).

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

551211402252 is a wasteful number, since it uses less digits than its factorization.

551211402252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27991 (or 27989 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 30.

The spelling of 551211402252 in words is "five hundred fifty-one billion, two hundred eleven million, four hundred two thousand, two hundred fifty-two".