161223465 has 24 divisors (see below), whose sum is σ = 279331200. Its totient is φ = 79370304.

The previous prime is 161223451. The next prime is 161223479. The reversal of 161223465 is 564322161.

It is an interprime number because it is at equal distance from previous prime (161223451) and next prime (161223479).

It is not a de Polignac number, because 161223465 - 2⁶ = 161223401 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29265 + ... + 34334.

It is an arithmetic number, because the mean of its divisors is an integer number (11638800).

Almost surely, 2^161223465 is an apocalyptic number.

161223465 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

161223465 is a deficient number, since it is larger than the sum of its proper divisors (118107735).

161223465 is a wasteful number, since it uses less digits than its factorization.

161223465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63633 (or 63620 counting only the distinct ones).

The product of its digits is 8640, while the sum is 30.

The square root of 161223465 is about 12697.3802416089. The cubic root of 161223465 is about 544.2637591070.

The spelling of 161223465 in words is "one hundred sixty-one million, two hundred twenty-three thousand, four hundred sixty-five".