551371992 has 64 divisors (see below), whose sum is σ = 1406937600. Its totient is φ = 180013440.

The previous prime is 551371991. The next prime is 551372021. The reversal of 551371992 is 299173155.

It is a super-2 number, since 2×551371992² = 608022147124096128, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551371991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 519142 + ... + 520202.

It is an arithmetic number, because the mean of its divisors is an integer number (21983400).

Almost surely, 2^551371992 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 551371992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (703468800).

551371992 is an abundant number, since it is smaller than the sum of its proper divisors (855565608).

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

551371992 is a wasteful number, since it uses less digits than its factorization.

551371992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1496 (or 1492 counting only the distinct ones).

The product of its digits is 85050, while the sum is 42.

The square root of 551371992 is about 23481.3115476968. The cubic root of 551371992 is about 820.0019789760.

The spelling of 551371992 in words is "five hundred fifty-one million, three hundred seventy-one thousand, nine hundred ninety-two".