63540531 has 10 divisors (see below), whose sum is σ = 94918692. Its totient is φ = 42360300.

The previous prime is 63540523. The next prime is 63540553. The reversal of 63540531 is 13504536.

It is not a de Polignac number, because 63540531 - 2³ = 63540523 is a prime.

It is a super-2 number, since 2×63540531² = 8074798159523922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 63540495 and 63540504.

It is not an unprimeable number, because it can be changed into a prime (63500531) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 392145 + ... + 392306.

Almost surely, 2^63540531 is an apocalyptic number.

63540531 is a deficient number, since it is larger than the sum of its proper divisors (31378161).

63540531 is an equidigital number, since it uses as much as digits as its factorization.

63540531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 784463 (or 784454 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

The square root of 63540531 is about 7971.2314606966. The cubic root of 63540531 is about 399.0404730271.

The spelling of 63540531 in words is "sixty-three million, five hundred forty thousand, five hundred thirty-one".