231020402 has 8 divisors (see below), whose sum is σ = 346704300. Its totient is φ = 115452304.

The previous prime is 231020371. The next prime is 231020417. The reversal of 231020402 is 204020132.

It can be written as a sum of positive squares in 2 ways, for example, as 219602761 + 11417641 = 14819^2 + 3379^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×231020402² = 106740852280483208, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23777 + ... + 32052.

Almost surely, 2^231020402 is an apocalyptic number.

231020402 is a deficient number, since it is larger than the sum of its proper divisors (115683898).

231020402 is a wasteful number, since it uses less digits than its factorization.

231020402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57900.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 231020402 is about 15199.3553152757. The cubic root of 231020402 is about 613.5973072782.

Adding to 231020402 its reverse (204020132), we get a palindrome (435040534).

The spelling of 231020402 in words is "two hundred thirty-one million, twenty thousand, four hundred two".