13143240381 has 16 divisors (see below), whose sum is σ = 18075230784. Its totient is φ = 8488738944.

The previous prime is 13143240371. The next prime is 13143240391. The reversal of 13143240381 is 18304234131.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (13143240371) and next prime (13143240391).

It is not a de Polignac number, because 13143240381 - 2¹¹ = 13143238333 is a prime.

It is a super-2 number, since 2×13143240381² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13143240301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 228231 + ... + 279956.

It is an arithmetic number, because the mean of its divisors is an integer number (1129701924).

Almost surely, 2^13143240381 is an apocalyptic number.

It is an amenable number.

13143240381 is a deficient number, since it is larger than the sum of its proper divisors (4931990403).

13143240381 is a wasteful number, since it uses less digits than its factorization.

13143240381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508460.

The product of its (nonzero) digits is 6912, while the sum is 30.

The spelling of 13143240381 in words is "thirteen billion, one hundred forty-three million, two hundred forty thousand, three hundred eighty-one".