161474531 has 8 divisors (see below), whose sum is σ = 163037184. Its totient is φ = 159916680.

The previous prime is 161474501. The next prime is 161474633. The reversal of 161474531 is 135474161.

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-161474531 is a prime.

It is a super-2 number, since 2×161474531² = 52148048323339922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161474501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125216 + ... + 126498.

It is an arithmetic number, because the mean of its divisors is an integer number (20379648).

Almost surely, 2^161474531 is an apocalyptic number.

161474531 is a deficient number, since it is larger than the sum of its proper divisors (1562653).

161474531 is a wasteful number, since it uses less digits than its factorization.

161474531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2401.

The product of its digits is 10080, while the sum is 32.

The square root of 161474531 is about 12707.2629232262. The cubic root of 161474531 is about 544.5461316829.

The spelling of 161474531 in words is "one hundred sixty-one million, four hundred seventy-four thousand, five hundred thirty-one".