53521869 has 8 divisors (see below), whose sum is σ = 73291360. Its totient is φ = 34716816.

The previous prime is 53521837. The next prime is 53521873. The reversal of 53521869 is 96812535.

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

It is not a de Polignac number, because 53521869 - 2⁵ = 53521837 is a prime.

It is a super-2 number, since 2×53521869² = 5729180922506322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53521889) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 240979 + ... + 241200.

It is an arithmetic number, because the mean of its divisors is an integer number (9161420).

Almost surely, 2^53521869 is an apocalyptic number.

It is an amenable number.

53521869 is a deficient number, since it is larger than the sum of its proper divisors (19769491).

53521869 is a wasteful number, since it uses less digits than its factorization.

53521869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 482219.

The product of its digits is 64800, while the sum is 39.

The square root of 53521869 is about 7315.8642004892. The cubic root of 53521869 is about 376.8574370613.

The spelling of 53521869 in words is "fifty-three million, five hundred twenty-one thousand, eight hundred sixty-nine".