399105022251 has 48 divisors (see below), whose sum is σ = 593501647200. Its totient is φ = 238276546560.

The previous prime is 399105022241. The next prime is 399105022301. The reversal of 399105022251 is 152220501993.

399105022251 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 399105022251 - 2⁷ = 399105022123 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (399105022201) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6516411 + ... + 6577371.

It is an arithmetic number, because the mean of its divisors is an integer number (12364617650).

Almost surely, 2^399105022251 is an apocalyptic number.

399105022251 is a deficient number, since it is larger than the sum of its proper divisors (194396624949).

399105022251 is a wasteful number, since it uses less digits than its factorization.

399105022251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61376 (or 61363 counting only the distinct ones).

The product of its (nonzero) digits is 48600, while the sum is 39.

The spelling of 399105022251 in words is "three hundred ninety-nine billion, one hundred five million, twenty-two thousand, two hundred fifty-one".