53271645 has 16 divisors (see below), whose sum is σ = 97411200. Its totient is φ = 24352704.

The previous prime is 53271643. The next prime is 53271683. The reversal of 53271645 is 54617235.

It is not a de Polignac number, because 53271645 - 2¹ = 53271643 is a prime.

It is a super-2 number, since 2×53271645² = 5675736322012050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53271643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 253570 + ... + 253779.

It is an arithmetic number, because the mean of its divisors is an integer number (6088200).

Almost surely, 2^53271645 is an apocalyptic number.

It is an amenable number.

53271645 is a deficient number, since it is larger than the sum of its proper divisors (44139555).

53271645 is a wasteful number, since it uses less digits than its factorization.

53271645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 507364.

The product of its digits is 25200, while the sum is 33.

The square root of 53271645 is about 7298.7426999450. The cubic root of 53271645 is about 376.2692282017.

The spelling of 53271645 in words is "fifty-three million, two hundred seventy-one thousand, six hundred forty-five".