53445131 has 4 divisors (see below), whose sum is σ = 54889632. Its totient is φ = 52000632.

The previous prime is 53445103. The next prime is 53445143. The reversal of 53445131 is 13154435.

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 53445131 - 2²² = 49250827 is a prime.

It is a super-2 number, since 2×53445131² = 5712764055214322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 53445131.

It is not an unprimeable number, because it can be changed into a prime (53445191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 722195 + ... + 722268.

It is an arithmetic number, because the mean of its divisors is an integer number (13722408).

Almost surely, 2^53445131 is an apocalyptic number.

53445131 is a deficient number, since it is larger than the sum of its proper divisors (1444501).

53445131 is a wasteful number, since it uses less digits than its factorization.

53445131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1444500.

The product of its digits is 3600, while the sum is 26.

The square root of 53445131 is about 7310.6176893611. The cubic root of 53445131 is about 376.6772420696.

Adding to 53445131 its reverse (13154435), we get a palindrome (66599566).

The spelling of 53445131 in words is "fifty-three million, four hundred forty-five thousand, one hundred thirty-one".