1213502431 has 16 divisors (see below), whose sum is σ = 1324710400. Its totient is φ = 1107636768.

The previous prime is 1213502429. The next prime is 1213502453. The reversal of 1213502431 is 1342053121.

It is a happy number.

It is not a de Polignac number, because 1213502431 - 2¹ = 1213502429 is a prime.

It is a super-2 number, since 2×1213502431² = 2945176300085819522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213502401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64030 + ... + 80788.

It is an arithmetic number, because the mean of its divisors is an integer number (82794400).

Almost surely, 2^1213502431 is an apocalyptic number.

1213502431 is a deficient number, since it is larger than the sum of its proper divisors (111207969).

1213502431 is a wasteful number, since it uses less digits than its factorization.

1213502431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16918.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 1213502431 is about 34835.3617894231. The cubic root of 1213502431 is about 1066.6294001412.

Adding to 1213502431 its reverse (1342053121), we get a palindrome (2555555552).

The spelling of 1213502431 in words is "one billion, two hundred thirteen million, five hundred two thousand, four hundred thirty-one".