161083240 has 32 divisors (see below), whose sum is σ = 363285000. Its totient is φ = 64282624.

The previous prime is 161083229. The next prime is 161083243. The reversal of 161083240 is 42380161.

It can be written as a sum of positive squares in 4 ways, for example, as 137405284 + 23677956 = 11722^2 + 4866^2 .

It is not an unprimeable number, because it can be changed into a prime (161083243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13476 + ... + 22444.

Almost surely, 2^161083240 is an apocalyptic number.

161083240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161083240 is an abundant number, since it is smaller than the sum of its proper divisors (202201760).

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

161083240 is a wasteful number, since it uses less digits than its factorization.

161083240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9429 (or 9425 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 161083240 is about 12691.8572320996. The cubic root of 161083240 is about 544.1059212002.

The spelling of 161083240 in words is "one hundred sixty-one million, eighty-three thousand, two hundred forty".