63121315 has 16 divisors (see below), whose sum is σ = 79377408. Its totient is φ = 48094816.

The previous prime is 63121309. The next prime is 63121319. The reversal of 63121315 is 51312136.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 63121315 - 2¹⁹ = 62597027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63121319) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29202 + ... + 31288.

It is an arithmetic number, because the mean of its divisors is an integer number (4961088).

Almost surely, 2^63121315 is an apocalyptic number.

63121315 is a deficient number, since it is larger than the sum of its proper divisors (16256093).

63121315 is a wasteful number, since it uses less digits than its factorization.

63121315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2378.

The product of its digits is 540, while the sum is 22.

The square root of 63121315 is about 7944.8923844191. The cubic root of 63121315 is about 398.1609640749.

It can be divided in two parts, 6312131 and 5, that added together give a palindrome (6312136).

The spelling of 63121315 in words is "sixty-three million, one hundred twenty-one thousand, three hundred fifteen".