11381202831 has 4 divisors (see below), whose sum is σ = 15174937112. Its totient is φ = 7587468552.

The previous prime is 11381202829. The next prime is 11381202839. The reversal of 11381202831 is 13820218311.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 11381202831 - 2¹ = 11381202829 is a prime.

It is a super-2 number, since 2×11381202831² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11381202839) 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, 1896867136 + ... + 1896867141.

It is an arithmetic number, because the mean of its divisors is an integer number (3793734278).

Almost surely, 2^11381202831 is an apocalyptic number.

11381202831 is a deficient number, since it is larger than the sum of its proper divisors (3793734281).

11381202831 is an equidigital number, since it uses as much as digits as its factorization.

11381202831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3793734280.

The product of its (nonzero) digits is 2304, while the sum is 30.

The spelling of 11381202831 in words is "eleven billion, three hundred eighty-one million, two hundred two thousand, eight hundred thirty-one".