63537213 has 4 divisors (see below), whose sum is σ = 84716288. Its totient is φ = 42358140.

The previous prime is 63537203. The next prime is 63537217. The reversal of 63537213 is 31273536.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 63537213 - 2¹³ = 63529021 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 (63537217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10589533 + ... + 10589538.

It is an arithmetic number, because the mean of its divisors is an integer number (21179072).

Almost surely, 2^63537213 is an apocalyptic number.

It is an amenable number.

63537213 is a deficient number, since it is larger than the sum of its proper divisors (21179075).

63537213 is a wasteful number, since it uses less digits than its factorization.

63537213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21179074.

The product of its digits is 11340, while the sum is 30.

The square root of 63537213 is about 7971.0233345537. The cubic root of 63537213 is about 399.0335271228.

The spelling of 63537213 in words is "sixty-three million, five hundred thirty-seven thousand, two hundred thirteen".