53145431 has 4 divisors (see below), whose sum is σ = 54581832. Its totient is φ = 51709032.

The previous prime is 53145409. The next prime is 53145437. The reversal of 53145431 is 13454135.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13454135 = 5 ⋅2690827.

It is a cyclic number.

It is not a de Polignac number, because 53145431 - 2¹⁰ = 53144407 is a prime.

It is a super-2 number, since 2×53145431² = 5648873672351522, 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 53145431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53145437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 718145 + ... + 718218.

It is an arithmetic number, because the mean of its divisors is an integer number (13645458).

Almost surely, 2^53145431 is an apocalyptic number.

53145431 is a deficient number, since it is larger than the sum of its proper divisors (1436401).

53145431 is a wasteful number, since it uses less digits than its factorization.

53145431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1436400.

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

The square root of 53145431 is about 7290.0912888660. The cubic root of 53145431 is about 375.9718342226.

Adding to 53145431 its reverse (13454135), we get a palindrome (66599566).

The spelling of 53145431 in words is "fifty-three million, one hundred forty-five thousand, four hundred thirty-one".