53249431 has 4 divisors (see below), whose sum is σ = 53304912. Its totient is φ = 53193952.

The previous prime is 53249429. The next prime is 53249467. The reversal of 53249431 is 13494235.

53249431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13494235 = 5 ⋅2698847.

It is a cyclic number.

It is not a de Polignac number, because 53249431 - 2¹ = 53249429 is a prime.

It is a super-2 number, since 2×53249431² = 5671003803647522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 53249393 and 53249402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53240431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26275 + ... + 28228.

It is an arithmetic number, because the mean of its divisors is an integer number (13326228).

Almost surely, 2^53249431 is an apocalyptic number.

53249431 is a deficient number, since it is larger than the sum of its proper divisors (55481).

53249431 is an equidigital number, since it uses as much as digits as its factorization.

53249431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55480.

The product of its digits is 12960, while the sum is 31.

The square root of 53249431 is about 7297.2207723215. The cubic root of 53249431 is about 376.2169201573.

The spelling of 53249431 in words is "fifty-three million, two hundred forty-nine thousand, four hundred thirty-one".