1230311031 has 8 divisors (see below), whose sum is σ = 1641953520. Its totient is φ = 819437952.

The previous prime is 1230311023. The next prime is 1230311041. The reversal of 1230311031 is 1301130321.

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

It is not a de Polignac number, because 1230311031 - 2³ = 1230311023 is a prime.

It is a super-2 number, since 2×1230311031² = 3027330466000565922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1230311031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1230311041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 188610 + ... + 195023.

It is an arithmetic number, because the mean of its divisors is an integer number (205244190).

Almost surely, 2^1230311031 is an apocalyptic number.

1230311031 is a deficient number, since it is larger than the sum of its proper divisors (411642489).

1230311031 is a wasteful number, since it uses less digits than its factorization.

1230311031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384705.

The product of its (nonzero) digits is 54, while the sum is 15.

The square root of 1230311031 is about 35075.7898129180. The cubic root of 1230311031 is about 1071.5315741254.

Adding to 1230311031 its reverse (1301130321), we get a palindrome (2531441352).

The spelling of 1230311031 in words is "one billion, two hundred thirty million, three hundred eleven thousand, thirty-one".