13146782531 has 2 divisors, whose sum is σ = 13146782532. Its totient is φ = 13146782530.

The previous prime is 13146782527. The next prime is 13146782581. The reversal of 13146782531 is 13528764131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13146782531 - 2² = 13146782527 is a prime.

It is a super-2 number, since 2×13146782531² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (13146782581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6573391265 + 6573391266.

It is an arithmetic number, because the mean of its divisors is an integer number (6573391266).

Almost surely, 2^13146782531 is an apocalyptic number.

13146782531 is a deficient number, since it is larger than the sum of its proper divisors (1).

13146782531 is an equidigital number, since it uses as much as digits as its factorization.

13146782531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 41.

The spelling of 13146782531 in words is "thirteen billion, one hundred forty-six million, seven hundred eighty-two thousand, five hundred thirty-one".