321431042 has 4 divisors (see below), whose sum is σ = 482146566. Its totient is φ = 160715520.

The previous prime is 321431023. The next prime is 321431051. The reversal of 321431042 is 240134123.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 240134123 = 29 ⋅8280487.

It can be written as a sum of positive squares in only one way, i.e., 219602761 + 101828281 = 14819^2 + 10091^2 .

It is a super-2 number, since 2×321431042² = 206635829522411528, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80357759 + ... + 80357762.

Almost surely, 2^321431042 is an apocalyptic number.

321431042 is a deficient number, since it is larger than the sum of its proper divisors (160715524).

321431042 is a wasteful number, since it uses less digits than its factorization.

321431042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160715523.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 321431042 is about 17928.4980408287. The cubic root of 321431042 is about 685.0084656279.

Adding to 321431042 its reverse (240134123), we get a palindrome (561565165).

The spelling of 321431042 in words is "three hundred twenty-one million, four hundred thirty-one thousand, forty-two".