15140151421 has 4 divisors (see below), whose sum is σ = 15163771644. Its totient is φ = 15116531200.

The previous prime is 15140151371. The next prime is 15140151427. The reversal of 15140151421 is 12415104151.

It is a happy number.

15140151421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12415104151 = 23 ⋅539787137.

It can be written as a sum of positive squares in 2 ways, for example, as 7510128921 + 7630022500 = 86661^2 + 87350^2 .

It is a cyclic number.

It is not a de Polignac number, because 15140151421 - 2¹⁹ = 15139627133 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 (15140151427) 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 3 ways as a sum of consecutive naturals, for example, 11809150 + ... + 11810431.

It is an arithmetic number, because the mean of its divisors is an integer number (3790942911).

Almost surely, 2^15140151421 is an apocalyptic number.

It is an amenable number.

15140151421 is a deficient number, since it is larger than the sum of its proper divisors (23620223).

15140151421 is an equidigital number, since it uses as much as digits as its factorization.

15140151421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23620222.

The product of its (nonzero) digits is 800, while the sum is 25.

Adding to 15140151421 its reverse (12415104151), we get a palindrome (27555255572).

The spelling of 15140151421 in words is "fifteen billion, one hundred forty million, one hundred fifty-one thousand, four hundred twenty-one".