161253267 has 24 divisors (see below), whose sum is σ = 252606672. Its totient is φ = 91224000.

The previous prime is 161253263. The next prime is 161253269. The reversal of 161253267 is 762352161.

161253267 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 161253267 - 2² = 161253263 is a prime.

It is a super-2 number, since 2×161253267² = 52005232236346578, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161253263) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9417 + ... + 20277.

It is an arithmetic number, because the mean of its divisors is an integer number (10525278).

Almost surely, 2^161253267 is an apocalyptic number.

161253267 is a deficient number, since it is larger than the sum of its proper divisors (91353405).

161253267 is a wasteful number, since it uses less digits than its factorization.

161253267 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10979 (or 10972 counting only the distinct ones).

The product of its digits is 15120, while the sum is 33.

The square root of 161253267 is about 12698.5537365481. The cubic root of 161253267 is about 544.2972925823.

The spelling of 161253267 in words is "one hundred sixty-one million, two hundred fifty-three thousand, two hundred sixty-seven".