250400131 has 2 divisors, whose sum is σ = 250400132. Its totient is φ = 250400130.

The previous prime is 250400077. The next prime is 250400159. The reversal of 250400131 is 131004052.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-250400131 is a prime.

It is a super-2 number, since 2×250400131² = 125400451209634322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (250400231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125200065 + 125200066.

It is an arithmetic number, because the mean of its divisors is an integer number (125200066).

Almost surely, 2^250400131 is an apocalyptic number.

250400131 is a deficient number, since it is larger than the sum of its proper divisors (1).

250400131 is an equidigital number, since it uses as much as digits as its factorization.

250400131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 250400131 is about 15824.0364951551. The cubic root of 250400131 is about 630.2964347803.

Adding to 250400131 its reverse (131004052), we get a palindrome (381404183).

The spelling of 250400131 in words is "two hundred fifty million, four hundred thousand, one hundred thirty-one".