161314631 has 2 divisors, whose sum is σ = 161314632. Its totient is φ = 161314630.

The previous prime is 161314577. The next prime is 161314639. The reversal of 161314631 is 136413161.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161314631 is a prime.

It is a super-2 number, since 2×161314631² = 52044820349332322, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 161314631.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161314639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80657315 + 80657316.

It is an arithmetic number, because the mean of its divisors is an integer number (80657316).

Almost surely, 2^161314631 is an apocalyptic number.

161314631 is a deficient number, since it is larger than the sum of its proper divisors (1).

161314631 is an equidigital number, since it uses as much as digits as its factorization.

161314631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 26.

The square root of 161314631 is about 12700.9696873900. The cubic root of 161314631 is about 544.3663268905.

Adding to 161314631 its reverse (136413161), we get a palindrome (297727792).

The spelling of 161314631 in words is "one hundred sixty-one million, three hundred fourteen thousand, six hundred thirty-one".