621798315 has 16 divisors (see below), whose sum is σ = 1011188256. Its totient is φ = 326188800.

The previous prime is 621798311. The next prime is 621798337. The reversal of 621798315 is 513897126.

It is not a de Polignac number, because 621798315 - 2² = 621798311 is a prime.

It is not an unprimeable number, because it can be changed into a prime (621798311) 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, 338866 + ... + 340695.

It is an arithmetic number, because the mean of its divisors is an integer number (63199266).

Almost surely, 2^621798315 is an apocalyptic number.

621798315 is a deficient number, since it is larger than the sum of its proper divisors (389389941).

621798315 is a wasteful number, since it uses less digits than its factorization.

621798315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 679630.

The product of its digits is 90720, while the sum is 42.

The square root of 621798315 is about 24935.8840829837. The cubic root of 621798315 is about 853.5255254392.

The spelling of 621798315 in words is "six hundred twenty-one million, seven hundred ninety-eight thousand, three hundred fifteen".