63545631 has 4 divisors (see below), whose sum is σ = 84727512. Its totient is φ = 42363752.

The previous prime is 63545627. The next prime is 63545653. The reversal of 63545631 is 13654536.

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 63545631 - 2² = 63545627 is a prime.

It is a super-2 number, since 2×63545631² = 8076094438376322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 63545592 and 63545601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63545231) 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, 10590936 + ... + 10590941.

It is an arithmetic number, because the mean of its divisors is an integer number (21181878).

Almost surely, 2^63545631 is an apocalyptic number.

63545631 is a deficient number, since it is larger than the sum of its proper divisors (21181881).

63545631 is a wasteful number, since it uses less digits than its factorization.

63545631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21181880.

The product of its digits is 32400, while the sum is 33.

The square root of 63545631 is about 7971.5513546611. The cubic root of 63545631 is about 399.0511489004.

The spelling of 63545631 in words is "sixty-three million, five hundred forty-five thousand, six hundred thirty-one".