249311131 has 2 divisors, whose sum is σ = 249311132. Its totient is φ = 249311130.

The previous prime is 249311107. The next prime is 249311159. The reversal of 249311131 is 131113942.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 249311131 - 2⁷ = 249311003 is a prime.

It is a super-2 number, since 2×249311131² = 124312080080998322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 249311096 and 249311105.

It is not a weakly prime, because it can be changed into another prime (249311431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124655565 + 124655566.

It is an arithmetic number, because the mean of its divisors is an integer number (124655566).

Almost surely, 2^249311131 is an apocalyptic number.

249311131 is a deficient number, since it is larger than the sum of its proper divisors (1).

249311131 is an equidigital number, since it uses as much as digits as its factorization.

249311131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 648, while the sum is 25.

The square root of 249311131 is about 15789.5893233485. The cubic root of 249311131 is about 629.3813789778.

It can be divided in two parts, 24931 and 1131, that added together give a palindrome (26062).

The spelling of 249311131 in words is "two hundred forty-nine million, three hundred eleven thousand, one hundred thirty-one".