431660461 has 32 divisors (see below), whose sum is σ = 475683840. Its totient is φ = 390873600.

The previous prime is 431660443. The next prime is 431660477. The reversal of 431660461 is 164066134.

It is a cyclic number.

It is not a de Polignac number, because 431660461 - 2¹¹ = 431658413 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (431660401) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5913121 + ... + 5913193.

It is an arithmetic number, because the mean of its divisors is an integer number (14865120).

Almost surely, 2^431660461 is an apocalyptic number.

It is an amenable number.

431660461 is a deficient number, since it is larger than the sum of its proper divisors (44023379).

431660461 is a wasteful number, since it uses less digits than its factorization.

431660461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 431660461 is about 20776.4400463602. The cubic root of 431660461 is about 755.7545260204.

The spelling of 431660461 in words is "four hundred thirty-one million, six hundred sixty thousand, four hundred sixty-one".