1323402531 has 12 divisors (see below), whose sum is σ = 1939532616. Its totient is φ = 802061920.

The previous prime is 1323402491. The next prime is 1323402541. The reversal of 1323402531 is 1352043231.

It is not a de Polignac number, because 1323402531 - 2⁶ = 1323402467 is a prime.

It is a super-2 number, since 2×1323402531² = 3502788518114411922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1323402541) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1822506 + ... + 1823231.

It is an arithmetic number, because the mean of its divisors is an integer number (161627718).

Almost surely, 2^1323402531 is an apocalyptic number.

1323402531 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1323402531 is a deficient number, since it is larger than the sum of its proper divisors (616130085).

1323402531 is a wasteful number, since it uses less digits than its factorization.

1323402531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3645762 (or 3645751 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 1323402531 is about 36378.5999043394. The cubic root of 1323402531 is about 1097.9030383753.

Adding to 1323402531 its reverse (1352043231), we get a palindrome (2675445762).

The spelling of 1323402531 in words is "one billion, three hundred twenty-three million, four hundred two thousand, five hundred thirty-one".