15221452207 has 16 divisors (see below), whose sum is σ = 16467892672. Its totient is φ = 13985913600.

The previous prime is 15221452199. The next prime is 15221452219. The reversal of 15221452207 is 70225412251.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 15221452207 - 2³ = 15221452199 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 (15221452277) 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, 5965582 + ... + 5968132.

It is an arithmetic number, because the mean of its divisors is an integer number (1029243292).

Almost surely, 2^15221452207 is an apocalyptic number.

15221452207 is a deficient number, since it is larger than the sum of its proper divisors (1246440465).

15221452207 is a wasteful number, since it uses less digits than its factorization.

15221452207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4498.

The product of its (nonzero) digits is 11200, while the sum is 31.

Adding to 15221452207 its reverse (70225412251), we get a palindrome (85446864458).

The spelling of 15221452207 in words is "fifteen billion, two hundred twenty-one million, four hundred fifty-two thousand, two hundred seven".