551455632 has 120 divisors (see below), whose sum is σ = 1899503424. Its totient is φ = 145435392.

The previous prime is 551455631. The next prime is 551455643. The reversal of 551455632 is 236554155.

551455632 is a `hidden beast` number, since 5 + 5 + 14 + 5 + 5 + 632 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (551455631) 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 23 ways as a sum of consecutive naturals, for example, 7938 + ... + 34145.

Almost surely, 2^551455632 is an apocalyptic number.

551455632 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 551455632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (949751712).

551455632 is an abundant number, since it is smaller than the sum of its proper divisors (1348047792).

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

551455632 is a wasteful number, since it uses less digits than its factorization.

551455632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42117 (or 42108 counting only the distinct ones).

The product of its digits is 90000, while the sum is 36.

The square root of 551455632 is about 23483.0924709673. The cubic root of 551455632 is about 820.0434400941.

The spelling of 551455632 in words is "five hundred fifty-one million, four hundred fifty-five thousand, six hundred thirty-two".