63721272 has 16 divisors (see below), whose sum is σ = 159303240. Its totient is φ = 21240416.

The previous prime is 63721267. The next prime is 63721277. The reversal of 63721272 is 27212736.

It is an interprime number because it is at equal distance from previous prime (63721267) and next prime (63721277).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63721277) 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, 1327503 + ... + 1327550.

Almost surely, 2^63721272 is an apocalyptic number.

It is an amenable number.

63721272 is an abundant number, since it is smaller than the sum of its proper divisors (95581968).

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

63721272 is a wasteful number, since it uses less digits than its factorization.

63721272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2655062 (or 2655058 counting only the distinct ones).

The product of its digits is 7056, while the sum is 30.

The square root of 63721272 is about 7982.5604914714. The cubic root of 63721272 is about 399.4184716383.

The spelling of 63721272 in words is "sixty-three million, seven hundred twenty-one thousand, two hundred seventy-two".