162133561 has 4 divisors (see below), whose sum is σ = 162956772. Its totient is φ = 161310352.

The previous prime is 162133553. The next prime is 162133567. The reversal of 162133561 is 165331261.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 157025961 + 5107600 = 12531^2 + 2260^2 .

It is a cyclic number.

It is not a de Polignac number, because 162133561 - 2³ = 162133553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (162133567) 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, 411310 + ... + 411703.

It is an arithmetic number, because the mean of its divisors is an integer number (40739193).

Almost surely, 2^162133561 is an apocalyptic number.

It is an amenable number.

162133561 is a deficient number, since it is larger than the sum of its proper divisors (823211).

162133561 is an equidigital number, since it uses as much as digits as its factorization.

162133561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 823210.

The product of its digits is 3240, while the sum is 28.

The square root of 162133561 is about 12733.1677519775. The cubic root of 162133561 is about 545.2859493169.

The spelling of 162133561 in words is "one hundred sixty-two million, one hundred thirty-three thousand, five hundred sixty-one".