161052521 has 8 divisors (see below), whose sum is σ = 184761984. Its totient is φ = 137518560.

The previous prime is 161052511. The next prime is 161052553. The reversal of 161052521 is 125250161.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161052521 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161052511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41900 + ... + 45581.

It is an arithmetic number, because the mean of its divisors is an integer number (23095248).

Almost surely, 2^161052521 is an apocalyptic number.

It is an amenable number.

161052521 is a deficient number, since it is larger than the sum of its proper divisors (23709463).

161052521 is an equidigital number, since it uses as much as digits as its factorization.

161052521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87751.

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 161052521 is about 12690.6469890231. The cubic root of 161052521 is about 544.0713315218.

The spelling of 161052521 in words is "one hundred sixty-one million, fifty-two thousand, five hundred twenty-one".