3131521452 has 144 divisors (see below), whose sum is σ = 8521820160. Its totient is φ = 993997440.

The previous prime is 3131521439. The next prime is 3131521453. The reversal of 3131521452 is 2541251313.

3131521452 is a `hidden beast` number, since 3 + 131 + 521 + 4 + 5 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (3131521453) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8532573 + ... + 8532939.

Almost surely, 2^3131521452 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3131521452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4260910080).

3131521452 is an abundant number, since it is smaller than the sum of its proper divisors (5390298708).

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

3131521452 is a wasteful number, since it uses less digits than its factorization.

3131521452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 509 (or 460 counting only the distinct ones).

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

The square root of 3131521452 is about 55959.9986776269. The cubic root of 3131521452 is about 1463.0251673458.

Adding to 3131521452 its reverse (2541251313), we get a palindrome (5672772765).

The spelling of 3131521452 in words is "three billion, one hundred thirty-one million, five hundred twenty-one thousand, four hundred fifty-two".