161003250 has 96 divisors (see below), whose sum is σ = 439021440. Its totient is φ = 42573600.

The previous prime is 161003239. The next prime is 161003251. The reversal of 161003250 is 52300161.

161003250 is a `hidden beast` number, since 1 + 610 + 0 + 3 + 2 + 50 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (161003251) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 366531 + ... + 366969.

It is an arithmetic number, because the mean of its divisors is an integer number (4573140).

Almost surely, 2^161003250 is an apocalyptic number.

161003250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 161003250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (219510720).

161003250 is an abundant number, since it is smaller than the sum of its proper divisors (278018190).

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

161003250 is a wasteful number, since it uses less digits than its factorization.

161003250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 625 (or 612 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 161003250 is about 12688.7056077442. The cubic root of 161003250 is about 544.0158430543.

The spelling of 161003250 in words is "one hundred sixty-one million, three thousand, two hundred fifty".