1511251234231 has 4 divisors (see below), whose sum is σ = 1512675600264. Its totient is φ = 1509826868200.

The previous prime is 1511251234193. The next prime is 1511251234253. The reversal of 1511251234231 is 1324321521151.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1511251234231 - 2⁹ = 1511251233719 is a prime.

It is a super-2 number, since 2×1511251234231² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1511251234193 and 1511251234202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1511251235231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 712181425 + ... + 712183546.

It is an arithmetic number, because the mean of its divisors is an integer number (378168900066).

Almost surely, 2^{1511251234231} is an apocalyptic number.

1511251234231 is a deficient number, since it is larger than the sum of its proper divisors (1424366033).

1511251234231 is a wasteful number, since it uses less digits than its factorization.

1511251234231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1424366032.

The product of its digits is 7200, while the sum is 31.

Adding to 1511251234231 its reverse (1324321521151), we get a palindrome (2835572755382).

The spelling of 1511251234231 in words is "one trillion, five hundred eleven billion, two hundred fifty-one million, two hundred thirty-four thousand, two hundred thirty-one".