63621275 has 6 divisors (see below), whose sum is σ = 78890412. Its totient is φ = 50897000.

The previous prime is 63621211. The next prime is 63621277. The reversal of 63621275 is 57212636.

It is not a de Polignac number, because 63621275 - 2⁶ = 63621211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63621277) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1272401 + ... + 1272450.

It is an arithmetic number, because the mean of its divisors is an integer number (13148402).

Almost surely, 2^63621275 is an apocalyptic number.

63621275 is a deficient number, since it is larger than the sum of its proper divisors (15269137).

63621275 is a wasteful number, since it uses less digits than its factorization.

63621275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2544861 (or 2544856 counting only the distinct ones).

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

The square root of 63621275 is about 7976.2945657743. The cubic root of 63621275 is about 399.2094281029.

The spelling of 63621275 in words is "sixty-three million, six hundred twenty-one thousand, two hundred seventy-five".