63381557 has 4 divisors (see below), whose sum is σ = 63974016. Its totient is φ = 62789100.

The previous prime is 63381553. The next prime is 63381569. The reversal of 63381557 is 75518336.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 63381557 - 2² = 63381553 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 63381557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63381551) 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, 296069 + ... + 296282.

It is an arithmetic number, because the mean of its divisors is an integer number (15993504).

Almost surely, 2^63381557 is an apocalyptic number.

It is an amenable number.

63381557 is a deficient number, since it is larger than the sum of its proper divisors (592459).

63381557 is a wasteful number, since it uses less digits than its factorization.

63381557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 592458.

The product of its digits is 75600, while the sum is 38.

The square root of 63381557 is about 7961.2534817075. The cubic root of 63381557 is about 398.7074045753.

The spelling of 63381557 in words is "sixty-three million, three hundred eighty-one thousand, five hundred fifty-seven".