1331402031 has 24 divisors (see below), whose sum is σ = 1941179760. Its totient is φ = 879302016.

The previous prime is 1331402027. The next prime is 1331402053. The reversal of 1331402031 is 1302041331.

It is not a de Polignac number, because 1331402031 - 2² = 1331402027 is a prime.

It is a super-2 number, since 2×1331402031² = 3545262736301849922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1331401995 and 1331402013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331402071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 873436 + ... + 874958.

It is an arithmetic number, because the mean of its divisors is an integer number (80882490).

Almost surely, 2^1331402031 is an apocalyptic number.

1331402031 is a deficient number, since it is larger than the sum of its proper divisors (609777729).

1331402031 is a wasteful number, since it uses less digits than its factorization.

1331402031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2375 (or 2372 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 1331402031 is about 36488.3821373324. The cubic root of 1331402031 is about 1100.1107411925.

Adding to 1331402031 its reverse (1302041331), we get a palindrome (2633443362).

The spelling of 1331402031 in words is "one billion, three hundred thirty-one million, four hundred two thousand, thirty-one".