53521407 has 12 divisors (see below), whose sum is σ = 79802944. Its totient is φ = 34529760.

The previous prime is 53521393. The next prime is 53521439. The reversal of 53521407 is 70412535.

It is a happy number.

It is not a de Polignac number, because 53521407 - 2¹² = 53517311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53521477) 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 11 ways as a sum of consecutive naturals, for example, 95638 + ... + 96195.

Almost surely, 2^53521407 is an apocalyptic number.

53521407 is a deficient number, since it is larger than the sum of its proper divisors (26281537).

53521407 is a wasteful number, since it uses less digits than its factorization.

53521407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191870 (or 191867 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 53521407 is about 7315.8326252041. The cubic root of 53521407 is about 376.8563527155.

The spelling of 53521407 in words is "fifty-three million, five hundred twenty-one thousand, four hundred seven".