551420156 has 12 divisors (see below), whose sum is σ = 1102840368. Its totient is φ = 236322912.

The previous prime is 551420153. The next prime is 551420161. The reversal of 551420156 is 651024155.

It is a happy number.

551420156 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551420153) 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 3 ways as a sum of consecutive naturals, for example, 9846761 + ... + 9846816.

It is an arithmetic number, because the mean of its divisors is an integer number (91903364).

Almost surely, 2^551420156 is an apocalyptic number.

It is an amenable number.

551420156 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

551420156 is a wasteful number, since it uses less digits than its factorization.

551420156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19693588 (or 19693586 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 29.

The square root of 551420156 is about 23482.3371068554. The cubic root of 551420156 is about 820.0258548263.

The spelling of 551420156 in words is "five hundred fifty-one million, four hundred twenty thousand, one hundred fifty-six".