63513775 has 12 divisors (see below), whose sum is σ = 84815752. Its totient is φ = 46902240.

The previous prime is 63513773. The next prime is 63513829. The reversal of 63513775 is 57731536.

It is a happy number.

It is not a de Polignac number, because 63513775 - 2¹ = 63513773 is a prime.

It is a super-2 number, since 2×63513775² = 8067999229501250, which contains 22 as substring.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63513773) 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, 97389 + ... + 98038.

Almost surely, 2^63513775 is an apocalyptic number.

63513775 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

63513775 is a deficient number, since it is larger than the sum of its proper divisors (21301977).

63513775 is a wasteful number, since it uses less digits than its factorization.

63513775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195450 (or 195445 counting only the distinct ones).

The product of its digits is 66150, while the sum is 37.

The square root of 63513775 is about 7969.5529987572. The cubic root of 63513775 is about 398.9844551034.

The spelling of 63513775 in words is "sixty-three million, five hundred thirteen thousand, seven hundred seventy-five".