1023431213 has 16 divisors (see below), whose sum is σ = 1177683840. Its totient is φ = 871214400.

The previous prime is 1023431191. The next prime is 1023431239. The reversal of 1023431213 is 3121343201.

It is not a de Polignac number, because 1023431213 - 2¹⁴ = 1023414829 is a prime.

It is a super-2 number, since 2×1023431213² = 2094822895485302738, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1023431413) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 792098 + ... + 793388.

It is an arithmetic number, because the mean of its divisors is an integer number (73605240).

Almost surely, 2^1023431213 is an apocalyptic number.

It is an amenable number.

1023431213 is a deficient number, since it is larger than the sum of its proper divisors (154252627).

1023431213 is a wasteful number, since it uses less digits than its factorization.

1023431213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1988.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 1023431213 is about 31991.1114686564. Note that the first 3 decimals coincide. The cubic root of 1023431213 is about 1007.7501838117.

Adding to 1023431213 its reverse (3121343201), we get a palindrome (4144774414).

The spelling of 1023431213 in words is "one billion, twenty-three million, four hundred thirty-one thousand, two hundred thirteen".