63531371 has 2 divisors, whose sum is σ = 63531372. Its totient is φ = 63531370.

The previous prime is 63531367. The next prime is 63531407. The reversal of 63531371 is 17313536.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 63531371 - 2² = 63531367 is a prime.

It is a super-2 number, since 2×63531371² = 8072470202279282, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (63531301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31765685 + 31765686.

It is an arithmetic number, because the mean of its divisors is an integer number (31765686).

Almost surely, 2^63531371 is an apocalyptic number.

63531371 is a deficient number, since it is larger than the sum of its proper divisors (1).

63531371 is an equidigital number, since it uses as much as digits as its factorization.

63531371 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5670, while the sum is 29.

The square root of 63531371 is about 7970.6568738091. The cubic root of 63531371 is about 399.0212968869.

The spelling of 63531371 in words is "sixty-three million, five hundred thirty-one thousand, three hundred seventy-one".