163251131 has 2 divisors, whose sum is σ = 163251132. Its totient is φ = 163251130.

The previous prime is 163251113. The next prime is 163251133. The reversal of 163251131 is 131152361.

Together with previous prime (163251113) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 163251131 - 2¹⁰ = 163250107 is a prime.

It is a super-2 number, since 2×163251131² = 53301863545558322, which contains 22 as substring.

Together with 163251133, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 163251097 and 163251106.

It is not a weakly prime, because it can be changed into another prime (163251133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81625565 + 81625566.

It is an arithmetic number, because the mean of its divisors is an integer number (81625566).

Almost surely, 2^163251131 is an apocalyptic number.

163251131 is a deficient number, since it is larger than the sum of its proper divisors (1).

163251131 is an equidigital number, since it uses as much as digits as its factorization.

163251131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 540, while the sum is 23.

The square root of 163251131 is about 12776.9765985541. The cubic root of 163251131 is about 546.5359483622.

The spelling of 163251131 in words is "one hundred sixty-three million, two hundred fifty-one thousand, one hundred thirty-one".