1215140431 has 2 divisors, whose sum is σ = 1215140432. Its totient is φ = 1215140430.

The previous prime is 1215140429. The next prime is 1215140453. The reversal of 1215140431 is 1340415121.

It is an a-pointer prime, because the next prime (1215140453) can be obtained adding 1215140431 to its sum of digits (22).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1215140431 - 2¹ = 1215140429 is a prime.

It is a super-2 number, since 2×1215140431² = 2953132534101731522, which contains 22 as substring.

Together with 1215140429, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1215140831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 607570215 + 607570216.

It is an arithmetic number, because the mean of its divisors is an integer number (607570216).

Almost surely, 2^1215140431 is an apocalyptic number.

1215140431 is a deficient number, since it is larger than the sum of its proper divisors (1).

1215140431 is an equidigital number, since it uses as much as digits as its factorization.

1215140431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 1215140431 is about 34858.8644536795. The cubic root of 1215140431 is about 1067.1091007166.

Adding to 1215140431 its reverse (1340415121), we get a palindrome (2555555552).

The spelling of 1215140431 in words is "one billion, two hundred fifteen million, one hundred forty thousand, four hundred thirty-one".