99920000251 has 16 divisors (see below), whose sum is σ = 106018357248. Its totient is φ = 93969136800.

The previous prime is 99920000249. The next prime is 99920000261. The reversal of 99920000251 is 15200002999.

It is a cyclic number.

It is not a de Polignac number, because 99920000251 - 2¹ = 99920000249 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 99920000251.

It is not an unprimeable number, because it can be changed into a prime (99920000261) 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, 3621430 + ... + 3648916.

It is an arithmetic number, because the mean of its divisors is an integer number (6626147328).

Almost surely, 2^99920000251 is an apocalyptic number.

99920000251 is the 158051-st decagonal number.

99920000251 is a deficient number, since it is larger than the sum of its proper divisors (6098356997).

99920000251 is a wasteful number, since it uses less digits than its factorization.

99920000251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30162.

The product of its (nonzero) digits is 14580, while the sum is 37.

The spelling of 99920000251 in words is "ninety-nine billion, nine hundred twenty million, two hundred fifty-one", and thus it is an aban number.