63120575231 has 4 divisors (see below), whose sum is σ = 72137800272. Its totient is φ = 54103350192.

The previous prime is 63120575227. The next prime is 63120575249. The reversal of 63120575231 is 13257502136.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 63120575231 - 2² = 63120575227 is a prime.

It is a super-2 number, since 2×63120575231² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 63120575191 and 63120575200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63120575831) 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, 4508612510 + ... + 4508612523.

It is an arithmetic number, because the mean of its divisors is an integer number (18034450068).

Almost surely, 2^63120575231 is an apocalyptic number.

63120575231 is a deficient number, since it is larger than the sum of its proper divisors (9017225041).

63120575231 is an equidigital number, since it uses as much as digits as its factorization.

63120575231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9017225040.

The product of its (nonzero) digits is 37800, while the sum is 35.

The spelling of 63120575231 in words is "sixty-three billion, one hundred twenty million, five hundred seventy-five thousand, two hundred thirty-one".