1311523254 has 12 divisors (see below), whose sum is σ = 2841633756. Its totient is φ = 437174412.

The previous prime is 1311523249. The next prime is 1311523303. The reversal of 1311523254 is 4523251131.

1311523254 is a `hidden beast` number, since 131 + 1 + 523 + 2 + 5 + 4 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 36431184 + ... + 36431219.

It is an arithmetic number, because the mean of its divisors is an integer number (236802813).

Almost surely, 2^1311523254 is an apocalyptic number.

1311523254 is an abundant number, since it is smaller than the sum of its proper divisors (1530110502).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1311523254 is a wasteful number, since it uses less digits than its factorization.

1311523254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72862411 (or 72862408 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 1311523254 is about 36214.9589810620. The cubic root of 1311523254 is about 1094.6081189801.

Adding to 1311523254 its reverse (4523251131), we get a palindrome (5834774385).

It can be divided in two parts, 131 and 1523254, that added together give a triangular number (1523385 = T₁₇₄₅).

The spelling of 1311523254 in words is "one billion, three hundred eleven million, five hundred twenty-three thousand, two hundred fifty-four".