13402031 has 16 divisors (see below), whose sum is σ = 14722560. Its totient is φ = 12159840.

The previous prime is 13402009. The next prime is 13402033. The reversal of 13402031 is 13020431.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13402031 is a prime.

It is a super-2 number, since 2×13402031² = 359228869849922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13401997 and 13402015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13402033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47216 + ... + 47498.

It is an arithmetic number, because the mean of its divisors is an integer number (920160).

Almost surely, 2^13402031 is an apocalyptic number.

13402031 is a deficient number, since it is larger than the sum of its proper divisors (1320529).

13402031 is a wasteful number, since it uses less digits than its factorization.

13402031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 13402031 is about 3660.8784464934. The cubic root of 13402031 is about 237.5327733166.

Adding to 13402031 its reverse (13020431), we get a palindrome (26422462).

The spelling of 13402031 in words is "thirteen million, four hundred two thousand, thirty-one".