63155391 has 16 divisors (see below), whose sum is σ = 96020064. Its totient is φ = 36578304.

The previous prime is 63155371. The next prime is 63155399. The reversal of 63155391 is 19355136.

It is not a de Polignac number, because 63155391 - 2²² = 58961087 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63155399) 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 in 15 ways as a sum of consecutive naturals, for example, 46966 + ... + 48291.

It is an arithmetic number, because the mean of its divisors is an integer number (6001254).

Almost surely, 2^63155391 is an apocalyptic number.

63155391 is a deficient number, since it is larger than the sum of its proper divisors (32864673).

63155391 is a wasteful number, since it uses less digits than its factorization.

63155391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95290.

The product of its digits is 12150, while the sum is 33.

The square root of 63155391 is about 7947.0366175072. The cubic root of 63155391 is about 398.2326001629.

It can be divided in two parts, 63155 and 391, that added together give a triangular number (63546 = T₃₅₆).

The spelling of 63155391 in words is "sixty-three million, one hundred fifty-five thousand, three hundred ninety-one".