163115251 has 6 divisors (see below), whose sum is σ = 176627940. Its totient is φ = 150567768.

The previous prime is 163115243. The next prime is 163115263. The reversal of 163115251 is 152511361.

It is a happy number.

It is not a de Polignac number, because 163115251 - 2³ = 163115243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163115231) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 482421 + ... + 482758.

It is an arithmetic number, because the mean of its divisors is an integer number (29437990).

Almost surely, 2^163115251 is an apocalyptic number.

163115251 is a deficient number, since it is larger than the sum of its proper divisors (13512689).

163115251 is an equidigital number, since it uses as much as digits as its factorization.

163115251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 965205 (or 965192 counting only the distinct ones).

The product of its digits is 900, while the sum is 25.

The square root of 163115251 is about 12771.6581147477. The cubic root of 163115251 is about 546.3842721936.

The spelling of 163115251 in words is "one hundred sixty-three million, one hundred fifteen thousand, two hundred fifty-one".