1023431211 has 24 divisors (see below), whose sum is σ = 1656271344. Its totient is φ = 603495360.

The previous prime is 1023431191. The next prime is 1023431239. The reversal of 1023431211 is 1121343201.

1023431211 is a `hidden beast` number, since 1 + 0 + 23 + 431 + 211 = 666.

It is not a de Polignac number, because 1023431211 - 2⁹ = 1023430699 is a prime.

It is a super-2 number, since 2×1023431211² = 2094822887297853042, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1023431011) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 136036 + ... + 143361.

It is an arithmetic number, because the mean of its divisors is an integer number (69011306).

Almost surely, 2^1023431211 is an apocalyptic number.

1023431211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1023431211 is a deficient number, since it is larger than the sum of its proper divisors (632840133).

1023431211 is a wasteful number, since it uses less digits than its factorization.

1023431211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279451 (or 279448 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1023431211 is about 31991.1114373977. Note that the first 3 decimals coincide. The cubic root of 1023431211 is about 1007.7501831553.

Adding to 1023431211 its reverse (1121343201), we get a palindrome (2144774412).

It can be divided in two parts, 1023 and 431211, that added together give a palindrome (432234).

The spelling of 1023431211 in words is "one billion, twenty-three million, four hundred thirty-one thousand, two hundred eleven".