550156997 has 4 divisors (see below), whose sum is σ = 592476780. Its totient is φ = 507837216.

The previous prime is 550156993. The next prime is 550157011. The reversal of 550156997 is 799651055.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 342768196 + 207388801 = 18514^2 + 14401^2 .

It is a cyclic number.

It is not a de Polignac number, because 550156997 - 2² = 550156993 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (550156991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21159872 + ... + 21159897.

It is an arithmetic number, because the mean of its divisors is an integer number (148119195).

Almost surely, 2^550156997 is an apocalyptic number.

It is an amenable number.

550156997 is a deficient number, since it is larger than the sum of its proper divisors (42319783).

550156997 is a wasteful number, since it uses less digits than its factorization.

550156997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42319782.

The product of its (nonzero) digits is 425250, while the sum is 47.

The square root of 550156997 is about 23455.4257475749. The cubic root of 550156997 is about 819.3992213547.

The spelling of 550156997 in words is "five hundred fifty million, one hundred fifty-six thousand, nine hundred ninety-seven".