745115131 has 2 divisors, whose sum is σ = 745115132. Its totient is φ = 745115130.

The previous prime is 745115113. The next prime is 745115141. The reversal of 745115131 is 131511547.

Together with previous prime (745115113) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 745115131 - 2⁷ = 745115003 is a prime.

It is a super-2 number, since 2×745115131² = 1110393116890294322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 745115131.

It is not a weakly prime, because it can be changed into another prime (745115141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 372557565 + 372557566.

It is an arithmetic number, because the mean of its divisors is an integer number (372557566).

Almost surely, 2^745115131 is an apocalyptic number.

745115131 is a deficient number, since it is larger than the sum of its proper divisors (1).

745115131 is an equidigital number, since it uses as much as digits as its factorization.

745115131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2100, while the sum is 28.

The square root of 745115131 is about 27296.7970831744. The cubic root of 745115131 is about 906.5834659241.

Adding to 745115131 its reverse (131511547), we get a palindrome (876626678).

The spelling of 745115131 in words is "seven hundred forty-five million, one hundred fifteen thousand, one hundred thirty-one".