63520031 has 2 divisors, whose sum is σ = 63520032. Its totient is φ = 63520030.

The previous prime is 63519977. The next prime is 63520069. The reversal of 63520031 is 13002536.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63520031 is a prime.

It is a super-2 number, since 2×63520031² = 8069588676481922, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 63519985 and 63520012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63520091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31760015 + 31760016.

It is an arithmetic number, because the mean of its divisors is an integer number (31760016).

Almost surely, 2^63520031 is an apocalyptic number.

63520031 is a deficient number, since it is larger than the sum of its proper divisors (1).

63520031 is an equidigital number, since it uses as much as digits as its factorization.

63520031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 63520031 is about 7969.9454828750. The cubic root of 63520031 is about 398.9975544392.

Adding to 63520031 its reverse (13002536), we get a palindrome (76522567).

The spelling of 63520031 in words is "sixty-three million, five hundred twenty thousand, thirty-one".