63521267 has 4 divisors (see below), whose sum is σ = 65238096. Its totient is φ = 61804440.

The previous prime is 63521261. The next prime is 63521273. The reversal of 63521267 is 76212536.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (63521261) and next prime (63521273).

It is a cyclic number.

It is not a de Polignac number, because 63521267 - 2⁴ = 63521251 is a prime.

It is a super-2 number, since 2×63521267² = 8069902722570578, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63521261) 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, 858359 + ... + 858432.

It is an arithmetic number, because the mean of its divisors is an integer number (16309524).

Almost surely, 2^63521267 is an apocalyptic number.

63521267 is a deficient number, since it is larger than the sum of its proper divisors (1716829).

63521267 is a wasteful number, since it uses less digits than its factorization.

63521267 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1716828.

The product of its digits is 15120, while the sum is 32.

The square root of 63521267 is about 7970.0230238061. The cubic root of 63521267 is about 399.0001423776. Note that the first 3 decimals are identical.

The spelling of 63521267 in words is "sixty-three million, five hundred twenty-one thousand, two hundred sixty-seven".