1513431431 has 2 divisors, whose sum is σ = 1513431432. Its totient is φ = 1513431430.

The previous prime is 1513431419. The next prime is 1513431457. The reversal of 1513431431 is 1341343151.

It is an a-pointer prime, because the next prime (1513431457) can be obtained adding 1513431431 to its sum of digits (26).

It is a weak prime.

It is an emirp because it is prime and its reverse (1341343151) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1513431431 - 2¹⁰ = 1513430407 is a prime.

It is a super-2 number, since 2×1513431431² = 4580949392677415522, 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 1513431431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1513431331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 756715715 + 756715716.

It is an arithmetic number, because the mean of its divisors is an integer number (756715716).

Almost surely, 2^1513431431 is an apocalyptic number.

1513431431 is a deficient number, since it is larger than the sum of its proper divisors (1).

1513431431 is an equidigital number, since it uses as much as digits as its factorization.

1513431431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2160, while the sum is 26.

The square root of 1513431431 is about 38902.8460526990. The cubic root of 1513431431 is about 1148.1207950264.

Adding to 1513431431 its reverse (1341343151), we get a palindrome (2854774582).

The spelling of 1513431431 in words is "one billion, five hundred thirteen million, four hundred thirty-one thousand, four hundred thirty-one".