1231040032 has 24 divisors (see below), whose sum is σ = 2457749952. Its totient is φ = 606849600.

The previous prime is 1231039973. The next prime is 1231040051. The reversal of 1231040032 is 2300401321.

It is a happy number.

It is a super-2 number, since 2×1231040032² = 3030919120773122048, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 1231039988 and 1231040015.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 268644 + ... + 273187.

It is an arithmetic number, because the mean of its divisors is an integer number (102406248).

Almost surely, 2^1231040032 is an apocalyptic number.

It is an amenable number.

1231040032 is a deficient number, since it is larger than the sum of its proper divisors (1226709920).

1231040032 is an equidigital number, since it uses as much as digits as its factorization.

1231040032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541912 (or 541904 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 1231040032 is about 35086.1800713614. The cubic root of 1231040032 is about 1071.7431719340.

Adding to 1231040032 its reverse (2300401321), we get a palindrome (3531441353).

The spelling of 1231040032 in words is "one billion, two hundred thirty-one million, forty thousand, thirty-two".