161442225 has 36 divisors (see below), whose sum is σ = 330472896. Its totient is φ = 73801440.

The previous prime is 161442191. The next prime is 161442247. The reversal of 161442225 is 522244161.

161442225 is a `hidden beast` number, since 1 + 614 + 4 + 22 + 25 = 666.

It is not a de Polignac number, because 161442225 - 2⁹ = 161441713 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 49677 + ... + 52826.

Almost surely, 2^161442225 is an apocalyptic number.

161442225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

161442225 is an abundant number, since it is smaller than the sum of its proper divisors (169030671).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161442225 is a wasteful number, since it uses less digits than its factorization.

161442225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102526 (or 102518 counting only the distinct ones).

The product of its digits is 3840, while the sum is 27.

The square root of 161442225 is about 12705.9916968334. The cubic root of 161442225 is about 544.5098137146.

Adding to 161442225 its reverse (522244161), we get a palindrome (683686386).

The spelling of 161442225 in words is "one hundred sixty-one million, four hundred forty-two thousand, two hundred twenty-five".