99220801 has 4 divisors (see below), whose sum is σ = 102421504. Its totient is φ = 96020100.

The previous prime is 99220787. The next prime is 99220811. The reversal of 99220801 is 10802299.

99220801 = T₁₄₁₄ + T₁₄₁₅ + ... + T₁₅₀₆.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 99220801 - 2⁷ = 99220673 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 3200671 = 99220801 / (9 + 9 + 2 + 2 + 0 + 8 + 0 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99220811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1600305 + ... + 1600366.

It is an arithmetic number, because the mean of its divisors is an integer number (25605376).

Almost surely, 2^99220801 is an apocalyptic number.

It is an amenable number.

99220801 is a deficient number, since it is larger than the sum of its proper divisors (3200703).

99220801 is a wasteful number, since it uses less digits than its factorization.

99220801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3200702.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 99220801 is about 9960.9638589847. The cubic root of 99220801 is about 462.9501646700.

It can be divided in two parts, 99 and 220801, that added together give a square (220900 = 470²).

The spelling of 99220801 in words is "ninety-nine million, two hundred twenty thousand, eight hundred one".