63550971 has 12 divisors (see below), whose sum is σ = 100141080. Its totient is φ = 38515680.

The previous prime is 63550969. The next prime is 63550973. The reversal of 63550971 is 17905536.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (63550969) and next prime (63550973).

It is not a de Polignac number, because 63550971 - 2¹ = 63550969 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (63550973) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 320866 + ... + 321063.

It is an arithmetic number, because the mean of its divisors is an integer number (8345090).

Almost surely, 2^63550971 is an apocalyptic number.

63550971 is a deficient number, since it is larger than the sum of its proper divisors (36590109).

63550971 is a wasteful number, since it uses less digits than its factorization.

63550971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 641946 (or 641943 counting only the distinct ones).

The product of its (nonzero) digits is 28350, while the sum is 36.

The square root of 63550971 is about 7971.8862887023. The cubic root of 63550971 is about 399.0623265555.

The spelling of 63550971 in words is "sixty-three million, five hundred fifty thousand, nine hundred seventy-one".