63221131 has 4 divisors (see below), whose sum is σ = 65401200. Its totient is φ = 61041064.

The previous prime is 63221117. The next prime is 63221143. The reversal of 63221131 is 13112236.

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

It is a cyclic number.

It is not a de Polignac number, because 63221131 - 2⁵ = 63221099 is a prime.

It is a super-2 number, since 2×63221131² = 7993822809838322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 63221099 and 63221108.

It is not an unprimeable number, because it can be changed into a prime (63221111) 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, 1089991 + ... + 1090048.

It is an arithmetic number, because the mean of its divisors is an integer number (16350300).

Almost surely, 2^63221131 is an apocalyptic number.

63221131 is a deficient number, since it is larger than the sum of its proper divisors (2180069).

63221131 is a wasteful number, since it uses less digits than its factorization.

63221131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2180068.

The product of its digits is 216, while the sum is 19.

The square root of 63221131 is about 7951.1716746653. The cubic root of 63221131 is about 398.3707289499.

Adding to 63221131 its reverse (13112236), we get a palindrome (76333367).

The spelling of 63221131 in words is "sixty-three million, two hundred twenty-one thousand, one hundred thirty-one".