161310541 has 4 divisors (see below), whose sum is σ = 184354912. Its totient is φ = 138266172.

The previous prime is 161310521. The next prime is 161310553. The reversal of 161310541 is 145013161.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 161310541 - 2¹⁵ = 161277773 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161310521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11522175 + ... + 11522188.

It is an arithmetic number, because the mean of its divisors is an integer number (46088728).

Almost surely, 2^161310541 is an apocalyptic number.

It is an amenable number.

161310541 is a deficient number, since it is larger than the sum of its proper divisors (23044371).

161310541 is an equidigital number, since it uses as much as digits as its factorization.

161310541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23044370.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 161310541 is about 12700.8086750411. The cubic root of 161310541 is about 544.3617261978.

The spelling of 161310541 in words is "one hundred sixty-one million, three hundred ten thousand, five hundred forty-one".