1230400031 has 4 divisors (see below), whose sum is σ = 1406171472. Its totient is φ = 1054628592.

The previous prime is 1230400027. The next prime is 1230400033. The reversal of 1230400031 is 1300040321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1300040321 = 1021 ⋅1273301.

It is a cyclic number.

It is not a de Polignac number, because 1230400031 - 2² = 1230400027 is a prime.

It is a super-2 number, since 2×1230400031² = 3027768472569601922, 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 = 1230399979 and 1230400015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1230400033) 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, 87885710 + ... + 87885723.

It is an arithmetic number, because the mean of its divisors is an integer number (351542868).

Almost surely, 2^1230400031 is an apocalyptic number.

1230400031 is a deficient number, since it is larger than the sum of its proper divisors (175771441).

1230400031 is an equidigital number, since it uses as much as digits as its factorization.

1230400031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175771440.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 1230400031 is about 35077.0584713143. The cubic root of 1230400031 is about 1071.5574114972.

Adding to 1230400031 its reverse (1300040321), we get a palindrome (2530440352).

The spelling of 1230400031 in words is "one billion, two hundred thirty million, four hundred thousand, thirty-one".