63523631 has 16 divisors (see below), whose sum is σ = 70947840. Its totient is φ = 56596320.

The previous prime is 63523609. The next prime is 63523633. The reversal of 63523631 is 13632536.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 63523631 - 2⁶ = 63523567 is a prime.

It is a super-2 number, since 2×63523631² = 8070503390848322, 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 = 63523594 and 63523603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63523633) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25466 + ... + 27848.

It is an arithmetic number, because the mean of its divisors is an integer number (4434240).

Almost surely, 2^63523631 is an apocalyptic number.

63523631 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

63523631 is a deficient number, since it is larger than the sum of its proper divisors (7424209).

63523631 is a wasteful number, since it uses less digits than its factorization.

63523631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2486.

The product of its digits is 9720, while the sum is 29.

The square root of 63523631 is about 7970.1713281460. The cubic root of 63523631 is about 399.0050920303.

The spelling of 63523631 in words is "sixty-three million, five hundred twenty-three thousand, six hundred thirty-one".