53431565 has 8 divisors (see below), whose sum is σ = 69946848. Its totient is φ = 38859280.

The previous prime is 53431531. The next prime is 53431597. The reversal of 53431565 is 56513435.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 53431565 - 2²⁰ = 52382989 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 485687 + ... + 485796.

It is an arithmetic number, because the mean of its divisors is an integer number (8743356).

Almost surely, 2^53431565 is an apocalyptic number.

53431565 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

53431565 is a deficient number, since it is larger than the sum of its proper divisors (16515283).

53431565 is a wasteful number, since it uses less digits than its factorization.

53431565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 971499.

The product of its digits is 27000, while the sum is 32.

The square root of 53431565 is about 7309.6898018999. The cubic root of 53431565 is about 376.6453686585.

The spelling of 53431565 in words is "fifty-three million, four hundred thirty-one thousand, five hundred sixty-five".