63145331 has 4 divisors (see below), whose sum is σ = 63563664. Its totient is φ = 62727000.

The previous prime is 63145319. The next prime is 63145339. The reversal of 63145331 is 13354136.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63145331 is a prime.

It is a super-2 number, since 2×63145331² = 7974665654199122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 63145331.

It is not an unprimeable number, because it can be changed into a prime (63145339) 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, 208940 + ... + 209241.

It is an arithmetic number, because the mean of its divisors is an integer number (15890916).

Almost surely, 2^63145331 is an apocalyptic number.

63145331 is a deficient number, since it is larger than the sum of its proper divisors (418333).

63145331 is a wasteful number, since it uses less digits than its factorization.

63145331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418332.

The product of its digits is 3240, while the sum is 26.

The square root of 63145331 is about 7946.4036519673. The cubic root of 63145331 is about 398.2114542632.

Adding to 63145331 its reverse (13354136), we get a palindrome (76499467).

The spelling of 63145331 in words is "sixty-three million, one hundred forty-five thousand, three hundred thirty-one".