162136261 has 4 divisors (see below), whose sum is σ = 185298592. Its totient is φ = 138973932.

The previous prime is 162136243. The next prime is 162136277. The reversal of 162136261 is 162631261.

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, and also an emirpimes, since its reverse is a distinct semiprime: 162631261 = 13 ⋅12510097.

It is a cyclic number.

It is not a de Polignac number, because 162136261 - 2²³ = 153747653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (162136061) 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, 11581155 + ... + 11581168.

It is an arithmetic number, because the mean of its divisors is an integer number (46324648).

Almost surely, 2^162136261 is an apocalyptic number.

It is an amenable number.

162136261 is a deficient number, since it is larger than the sum of its proper divisors (23162331).

162136261 is an equidigital number, since it uses as much as digits as its factorization.

162136261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23162330.

The product of its digits is 2592, while the sum is 28.

The square root of 162136261 is about 12733.2737738572. The cubic root of 162136261 is about 545.2889761710.

The spelling of 162136261 in words is "one hundred sixty-two million, one hundred thirty-six thousand, two hundred sixty-one".