161149031 has 2 divisors, whose sum is σ = 161149032. Its totient is φ = 161149030.

The previous prime is 161148941. The next prime is 161149061. The reversal of 161149031 is 130941161.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161149031 is a prime.

It is a super-2 number, since 2×161149031² = 51938020384477922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161149061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80574515 + 80574516.

It is an arithmetic number, because the mean of its divisors is an integer number (80574516).

Almost surely, 2^161149031 is an apocalyptic number.

161149031 is a deficient number, since it is larger than the sum of its proper divisors (1).

161149031 is an equidigital number, since it uses as much as digits as its factorization.

161149031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 161149031 is about 12694.4488261602. The cubic root of 161149031 is about 544.1799872550.

The spelling of 161149031 in words is "one hundred sixty-one million, one hundred forty-nine thousand, thirty-one".