550021157 has 16 divisors (see below), whose sum is σ = 645194880. Its totient is φ = 459157248.

The previous prime is 550021151. The next prime is 550021159. The reversal of 550021157 is 751120055.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 550021157 - 2⁴ = 550021141 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 (550021151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35153 + ... + 48329.

It is an arithmetic number, because the mean of its divisors is an integer number (40324680).

Almost surely, 2^550021157 is an apocalyptic number.

It is an amenable number.

550021157 is a deficient number, since it is larger than the sum of its proper divisors (95173723).

550021157 is a wasteful number, since it uses less digits than its factorization.

550021157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13340.

The product of its (nonzero) digits is 1750, while the sum is 26.

The square root of 550021157 is about 23452.5298635350. The cubic root of 550021157 is about 819.3317761509.

The spelling of 550021157 in words is "five hundred fifty million, twenty-one thousand, one hundred fifty-seven".