40251313 has 2 divisors, whose sum is σ = 40251314. Its totient is φ = 40251312.

The previous prime is 40251269. The next prime is 40251319. The reversal of 40251313 is 31315204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27804529 + 12446784 = 5273^2 + 3528^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40251313 is a prime.

It is not a weakly prime, because it can be changed into another prime (40251319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20125656 + 20125657.

It is an arithmetic number, because the mean of its divisors is an integer number (20125657).

Almost surely, 2^40251313 is an apocalyptic number.

It is an amenable number.

40251313 is a deficient number, since it is larger than the sum of its proper divisors (1).

40251313 is an equidigital number, since it uses as much as digits as its factorization.

40251313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 40251313 is about 6344.3922482772. The cubic root of 40251313 is about 342.7099265376.

Adding to 40251313 its reverse (31315204), we get a palindrome (71566517).

It can be divided in two parts, 4025 and 1313, that multiplied together give a palindrome (5284825).

The spelling of 40251313 in words is "forty million, two hundred fifty-one thousand, three hundred thirteen".