1229431031 has 2 divisors, whose sum is σ = 1229431032. Its totient is φ = 1229431030.

The previous prime is 1229431003. The next prime is 1229431051. The reversal of 1229431031 is 1301349221.

It is a strong prime.

It is an emirp because it is prime and its reverse (1301349221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1229431031 - 2¹⁸ = 1229168887 is a prime.

It is a super-2 number, since 2×1229431031² = 3023001319971445922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1229431051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 614715515 + 614715516.

It is an arithmetic number, because the mean of its divisors is an integer number (614715516).

Almost surely, 2^1229431031 is an apocalyptic number.

1229431031 is a deficient number, since it is larger than the sum of its proper divisors (1).

1229431031 is an equidigital number, since it uses as much as digits as its factorization.

1229431031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 1229431031 is about 35063.2433040642. The cubic root of 1229431031 is about 1071.2760363872.

The spelling of 1229431031 in words is "one billion, two hundred twenty-nine million, four hundred thirty-one thousand, thirty-one".