63521070 has 16 divisors (see below), whose sum is σ = 152450640. Its totient is φ = 16938944.

The previous prime is 63521057. The next prime is 63521071. The reversal of 63521070 is 7012536.

It is a self number, because there is not a number n which added to its sum of digits gives 63521070.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63521071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1058655 + ... + 1058714.

It is an arithmetic number, because the mean of its divisors is an integer number (9528165).

Almost surely, 2^63521070 is an apocalyptic number.

63521070 is an abundant number, since it is smaller than the sum of its proper divisors (88929570).

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

63521070 is a wasteful number, since it uses less digits than its factorization.

63521070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2117379.

The product of its (nonzero) digits is 1260, while the sum is 24.

The square root of 63521070 is about 7970.0106649866. The cubic root of 63521070 is about 398.9997299010. Note that the first 3 decimals are identical.

The spelling of 63521070 in words is "sixty-three million, five hundred twenty-one thousand, seventy".