161213432 has 8 divisors (see below), whose sum is σ = 302275200. Its totient is φ = 80606712.

The previous prime is 161213411. The next prime is 161213441. The reversal of 161213432 is 234312161.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 161213398 and 161213407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10075832 + ... + 10075847.

It is an arithmetic number, because the mean of its divisors is an integer number (37784400).

Almost surely, 2^161213432 is an apocalyptic number.

It is an amenable number.

161213432 is a deficient number, since it is larger than the sum of its proper divisors (141061768).

161213432 is a wasteful number, since it uses less digits than its factorization.

161213432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20151685 (or 20151681 counting only the distinct ones).

The product of its digits is 864, while the sum is 23.

The square root of 161213432 is about 12696.9851539647. The cubic root of 161213432 is about 544.2524689565.

Adding to 161213432 its reverse (234312161), we get a palindrome (395525593).

The spelling of 161213432 in words is "one hundred sixty-one million, two hundred thirteen thousand, four hundred thirty-two".