1231434515 has 4 divisors (see below), whose sum is σ = 1477721424. Its totient is φ = 985147608.

The previous prime is 1231434493. The next prime is 1231434539. The reversal of 1231434515 is 5154341321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5154341321 = 55639 ⋅92639.

It is a cyclic number.

It is not a de Polignac number, because 1231434515 - 2¹⁶ = 1231368979 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123143447 + ... + 123143456.

It is an arithmetic number, because the mean of its divisors is an integer number (369430356).

Almost surely, 2^1231434515 is an apocalyptic number.

1231434515 is a deficient number, since it is larger than the sum of its proper divisors (246286909).

1231434515 is an equidigital number, since it uses as much as digits as its factorization.

1231434515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246286908.

The product of its digits is 7200, while the sum is 29.

The square root of 1231434515 is about 35091.8012504346. The cubic root of 1231434515 is about 1071.8576386448.

Adding to 1231434515 its reverse (5154341321), we get a palindrome (6385775836).

The spelling of 1231434515 in words is "one billion, two hundred thirty-one million, four hundred thirty-four thousand, five hundred fifteen".