161542230 has 32 divisors (see below), whose sum is σ = 389664000. Its totient is φ = 42859872.

The previous prime is 161542229. The next prime is 161542231. The reversal of 161542230 is 32245161.

It is an interprime number because it is at equal distance from previous prime (161542229) and next prime (161542231).

It is a self number, because there is not a number n which added to its sum of digits gives 161542230.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161542231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7560 + ... + 19499.

It is an arithmetic number, because the mean of its divisors is an integer number (12177000).

Almost surely, 2^161542230 is an apocalyptic number.

161542230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161542230 is an abundant number, since it is smaller than the sum of its proper divisors (228121770).

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

161542230 is a wasteful number, since it uses less digits than its factorization.

161542230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27268.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 161542230 is about 12709.9264356644. The cubic root of 161542230 is about 544.6222222745.

Adding to 161542230 its reverse (32245161), we get a palindrome (193787391).

The spelling of 161542230 in words is "one hundred sixty-one million, five hundred forty-two thousand, two hundred thirty".