161253351 has 24 divisors (see below), whose sum is σ = 274786304. Its totient is φ = 89171280.

The previous prime is 161253349. The next prime is 161253359. The reversal of 161253351 is 153352161.

161253351 is a `hidden beast` number, since 1 + 61 + 253 + 351 = 666.

It is not a de Polignac number, because 161253351 - 2¹ = 161253349 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 (161253359) 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, 39331 + ... + 43236.

Almost surely, 2^161253351 is an apocalyptic number.

161253351 is a deficient number, since it is larger than the sum of its proper divisors (113532953).

161253351 is a wasteful number, since it uses less digits than its factorization.

161253351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82611 (or 82608 counting only the distinct ones).

The product of its digits is 2700, while the sum is 27.

The square root of 161253351 is about 12698.5570440109. The cubic root of 161253351 is about 544.2973870940.

It can be divided in two parts, 161253 and 351, that added together give a square (161604 = 402²).

The spelling of 161253351 in words is "one hundred sixty-one million, two hundred fifty-three thousand, three hundred fifty-one".