1402320331 has 4 divisors (see below), whose sum is σ = 1403599752. Its totient is φ = 1401040912.

The previous prime is 1402320329. The next prime is 1402320349. The reversal of 1402320331 is 1330232041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1330232041 = 31 ⋅42910711.

It is a cyclic number.

It is not a de Polignac number, because 1402320331 - 2¹ = 1402320329 is a prime.

It is a super-2 number, since 2×1402320331² = 3933004621471899122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1402320299 and 1402320308.

It is not an unprimeable number, because it can be changed into a prime (1402320301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 638065 + ... + 640258.

It is an arithmetic number, because the mean of its divisors is an integer number (350899938).

Almost surely, 2^1402320331 is an apocalyptic number.

1402320331 is a deficient number, since it is larger than the sum of its proper divisors (1279421).

1402320331 is a wasteful number, since it uses less digits than its factorization.

1402320331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1279420.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 1402320331 is about 37447.5677581335. The cubic root of 1402320331 is about 1119.3066315850.

Adding to 1402320331 its reverse (1330232041), we get a palindrome (2732552372).

The spelling of 1402320331 in words is "one billion, four hundred two million, three hundred twenty thousand, three hundred thirty-one".