63151861 has 2 divisors, whose sum is σ = 63151862. Its totient is φ = 63151860.

The previous prime is 63151853. The next prime is 63151903. The reversal of 63151861 is 16815136.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62331025 + 820836 = 7895^2 + 906^2 .

It is a cyclic number.

It is not a de Polignac number, because 63151861 - 2³ = 63151853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63151831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31575930 + 31575931.

It is an arithmetic number, because the mean of its divisors is an integer number (31575931).

Almost surely, 2^63151861 is an apocalyptic number.

It is an amenable number.

63151861 is a deficient number, since it is larger than the sum of its proper divisors (1).

63151861 is an equidigital number, since it uses as much as digits as its factorization.

63151861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4320, while the sum is 31.

The square root of 63151861 is about 7946.8145190384. The cubic root of 63151861 is about 398.2251804360.

Adding to 63151861 its reverse (16815136), we get a palindrome (79966997).

The spelling of 63151861 in words is "sixty-three million, one hundred fifty-one thousand, eight hundred sixty-one".