161255190 has 16 divisors (see below), whose sum is σ = 387012528. Its totient is φ = 43001376.

The previous prime is 161255161. The next prime is 161255191. The reversal of 161255190 is 91552161.

161255190 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×161255190² = 52006472603872200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 5375173 = 161255190 / (1 + 6 + 1 + 2 + 5 + 5 + 1 + 9 + 0).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161255191) 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, 2687557 + ... + 2687616.

It is an arithmetic number, because the mean of its divisors is an integer number (24188283).

Almost surely, 2^161255190 is an apocalyptic number.

161255190 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161255190 is an abundant number, since it is smaller than the sum of its proper divisors (225757338).

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

161255190 is a wasteful number, since it uses less digits than its factorization.

161255190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5375183.

The product of its (nonzero) digits is 2700, while the sum is 30.

The square root of 161255190 is about 12698.6294536064. The cubic root of 161255190 is about 544.2994562170.

The spelling of 161255190 in words is "one hundred sixty-one million, two hundred fifty-five thousand, one hundred ninety".