15200222021 has 4 divisors (see below), whose sum is σ = 15206169132. Its totient is φ = 15194274912.

The previous prime is 15200221997. The next prime is 15200222027. The reversal of 15200222021 is 12022200251.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11715681121 + 3484540900 = 108239^2 + 59030^2 .

It is a cyclic number.

It is not a de Polignac number, because 15200222021 - 2⁶ = 15200221957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15200222027) 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, 2969720 + ... + 2974833.

It is an arithmetic number, because the mean of its divisors is an integer number (3801542283).

Almost surely, 2^15200222021 is an apocalyptic number.

It is an amenable number.

15200222021 is a deficient number, since it is larger than the sum of its proper divisors (5947111).

15200222021 is an equidigital number, since it uses as much as digits as its factorization.

15200222021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5947110.

The product of its (nonzero) digits is 160, while the sum is 17.

Adding to 15200222021 its reverse (12022200251), we get a palindrome (27222422272).

The spelling of 15200222021 in words is "fifteen billion, two hundred million, two hundred twenty-two thousand, twenty-one".