108401999251 has 12 divisors (see below), whose sum is σ = 135800307552. Its totient is φ = 85768614288.

The previous prime is 108401999249. The next prime is 108401999257. The reversal of 108401999251 is 152999104801.

It is not a de Polignac number, because 108401999251 - 2¹ = 108401999249 is a prime.

It is a super-2 number, since 2×108401999251² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a junction number, because it is equal to n+sod(n) for n = 108401999195 and 108401999204.

It is not an unprimeable number, because it can be changed into a prime (108401999257) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 85087275 + ... + 85088548.

It is an arithmetic number, because the mean of its divisors is an integer number (11316692296).

Almost surely, 2^108401999251 is an apocalyptic number.

108401999251 is a deficient number, since it is larger than the sum of its proper divisors (27398308301).

108401999251 is a wasteful number, since it uses less digits than its factorization.

108401999251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170175850 (or 170175843 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 49.

The spelling of 108401999251 in words is "one hundred eight billion, four hundred one million, nine hundred ninety-nine thousand, two hundred fifty-one".