15140261221 has 8 divisors (see below), whose sum is σ = 15805203840. Its totient is φ = 14475874512.

The previous prime is 15140261189. The next prime is 15140261243. The reversal of 15140261221 is 12216204151.

15140261221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 15140261221 - 2⁵ = 15140261189 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 (15140261621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82825 + ... + 192718.

It is an arithmetic number, because the mean of its divisors is an integer number (1975650480).

Almost surely, 2^15140261221 is an apocalyptic number.

It is an amenable number.

15140261221 is a deficient number, since it is larger than the sum of its proper divisors (664942619).

15140261221 is a wasteful number, since it uses less digits than its factorization.

15140261221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277955.

The product of its (nonzero) digits is 960, while the sum is 25.

Adding to 15140261221 its reverse (12216204151), we get a palindrome (27356465372).

The spelling of 15140261221 in words is "fifteen billion, one hundred forty million, two hundred sixty-one thousand, two hundred twenty-one".