160431921 has 40 divisors (see below), whose sum is σ = 259547904. Its totient is φ = 98172000.

The previous prime is 160431911. The next prime is 160431937. The reversal of 160431921 is 129134061.

160431921 is a `hidden beast` number, since 1 + 604 + 31 + 9 + 21 = 666.

It is not a de Polignac number, because 160431921 - 2¹⁷ = 160300849 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (160431911) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 264000 + ... + 264606.

Almost surely, 2^160431921 is an apocalyptic number.

It is an amenable number.

160431921 is a deficient number, since it is larger than the sum of its proper divisors (99115983).

160431921 is a wasteful number, since it uses less digits than its factorization.

160431921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 883 (or 874 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 160431921 is about 12666.1723105285. The cubic root of 160431921 is about 543.3715902236.

Adding to 160431921 its reverse (129134061), we get a palindrome (289565982).

The spelling of 160431921 in words is "one hundred sixty million, four hundred thirty-one thousand, nine hundred twenty-one".