830155257 has 8 divisors (see below), whose sum is σ = 1229859680. Its totient is φ = 553436820.

The previous prime is 830155213. The next prime is 830155279. The reversal of 830155257 is 752551038.

It is not a de Polignac number, because 830155257 - 2¹⁰ = 830154233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (830155357) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15373219 + ... + 15373272.

It is an arithmetic number, because the mean of its divisors is an integer number (153732460).

Almost surely, 2^830155257 is an apocalyptic number.

It is an amenable number.

830155257 is a deficient number, since it is larger than the sum of its proper divisors (399704423).

830155257 is a wasteful number, since it uses less digits than its factorization.

830155257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30746500 (or 30746494 counting only the distinct ones).

The product of its (nonzero) digits is 42000, while the sum is 36.

The square root of 830155257 is about 28812.4149803518. The cubic root of 830155257 is about 939.8382311782.

The spelling of 830155257 in words is "eight hundred thirty million, one hundred fifty-five thousand, two hundred fifty-seven".