161350531 has 2 divisors, whose sum is σ = 161350532. Its totient is φ = 161350530.

The previous prime is 161350493. The next prime is 161350537. The reversal of 161350531 is 135053161.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 161350531 - 2⁹ = 161350019 is a prime.

It is a super-2 number, since 2×161350531² = 52067987707963922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161350496 and 161350505.

It is not a weakly prime, because it can be changed into another prime (161350537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80675265 + 80675266.

It is an arithmetic number, because the mean of its divisors is an integer number (80675266).

Almost surely, 2^161350531 is an apocalyptic number.

161350531 is a deficient number, since it is larger than the sum of its proper divisors (1).

161350531 is an equidigital number, since it uses as much as digits as its factorization.

161350531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1350, while the sum is 25.

The square root of 161350531 is about 12702.3828866870. The cubic root of 161350531 is about 544.4067061614.

The spelling of 161350531 in words is "one hundred sixty-one million, three hundred fifty thousand, five hundred thirty-one".