1230402331 has 4 divisors (see below), whose sum is σ = 1256581152. Its totient is φ = 1204223512.

The previous prime is 1230402317. The next prime is 1230402337. The reversal of 1230402331 is 1332040321.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1230402331 - 2⁷ = 1230402203 is a prime.

It is a super-2 number, since 2×1230402331² = 3027779792260467122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1230402299 and 1230402308.

It is not an unprimeable number, because it can be changed into a prime (1230402337) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13089340 + ... + 13089433.

It is an arithmetic number, because the mean of its divisors is an integer number (314145288).

Almost surely, 2^1230402331 is an apocalyptic number.

1230402331 is a deficient number, since it is larger than the sum of its proper divisors (26178821).

1230402331 is an equidigital number, since it uses as much as digits as its factorization.

1230402331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26178820.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 1230402331 is about 35077.0912562601. The cubic root of 1230402331 is about 1071.5580791880.

Adding to 1230402331 its reverse (1332040321), we get a palindrome (2562442652).

The spelling of 1230402331 in words is "one billion, two hundred thirty million, four hundred two thousand, three hundred thirty-one".