161572244 has 12 divisors (see below), whose sum is σ = 283998624. Its totient is φ = 80429784.

The previous prime is 161572241. The next prime is 161572261. The reversal of 161572244 is 442275161.

It is a super-2 number, since 2×161572244² = 52211180062391072, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 161572244.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161572241) 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, 88064 + ... + 89879.

It is an arithmetic number, because the mean of its divisors is an integer number (23666552).

Almost surely, 2^161572244 is an apocalyptic number.

It is an amenable number.

161572244 is a deficient number, since it is larger than the sum of its proper divisors (122426380).

161572244 is a wasteful number, since it uses less digits than its factorization.

161572244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178174 (or 178172 counting only the distinct ones).

The product of its digits is 13440, while the sum is 32.

The square root of 161572244 is about 12711.1071114990. The cubic root of 161572244 is about 544.6559498414.

The spelling of 161572244 in words is "one hundred sixty-one million, five hundred seventy-two thousand, two hundred forty-four".