1531212453 has 12 divisors (see below), whose sum is σ = 2253483180. Its totient is φ = 1001547456.

The previous prime is 1531212379. The next prime is 1531212461. The reversal of 1531212453 is 3542121351.

1531212453 is a `hidden beast` number, since 1 + 531 + 2 + 124 + 5 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1240237089 + 290975364 = 35217^2 + 17058^2 .

It is not a de Polignac number, because 1531212453 - 2¹⁶ = 1531146917 is a prime.

It is a super-2 number, since 2×1531212453² = 4689223152444554418, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1531212493) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1604568 + ... + 1605521.

It is an arithmetic number, because the mean of its divisors is an integer number (187790265).

Almost surely, 2^1531212453 is an apocalyptic number.

It is an amenable number.

1531212453 is a deficient number, since it is larger than the sum of its proper divisors (722270727).

1531212453 is a wasteful number, since it uses less digits than its factorization.

1531212453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3210148 (or 3210145 counting only the distinct ones).

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

The square root of 1531212453 is about 39130.7098453376. The cubic root of 1531212453 is about 1152.5996520913.

The spelling of 1531212453 in words is "one billion, five hundred thirty-one million, two hundred twelve thousand, four hundred fifty-three".