63561312 has 36 divisors (see below), whose sum is σ = 180753300. Its totient is φ = 21187008.

The previous prime is 63561299. The next prime is 63561313. The reversal of 63561312 is 21316536.

63561312 is a `hidden beast` number, since 6 + 35 + 613 + 12 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×63561312² = 8080080766322688, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63561313) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 110062 + ... + 110637.

It is an arithmetic number, because the mean of its divisors is an integer number (5020925).

Almost surely, 2^63561312 is an apocalyptic number.

It is an amenable number.

63561312 is an abundant number, since it is smaller than the sum of its proper divisors (117191988).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

63561312 is a wasteful number, since it uses less digits than its factorization.

63561312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220715 (or 220704 counting only the distinct ones).

The product of its digits is 3240, while the sum is 27.

The square root of 63561312 is about 7972.5348541101. The cubic root of 63561312 is about 399.0839704929.

Adding to 63561312 its reverse (21316536), we get a palindrome (84877848).

The spelling of 63561312 in words is "sixty-three million, five hundred sixty-one thousand, three hundred twelve".