15270454721 has 4 divisors (see below), whose sum is σ = 15421647444. Its totient is φ = 15119262000.

The previous prime is 15270454709. The next prime is 15270454733. The reversal of 15270454721 is 12745407251.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (15270454709) and next prime (15270454733).

It can be written as a sum of positive squares in 2 ways, for example, as 6199987600 + 9070467121 = 78740^2 + 95239^2 .

It is a cyclic number.

It is not a de Polignac number, because 15270454721 - 2⁶ = 15270454657 is a prime.

It is a super-2 number, since 2×15270454721² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15270414721) 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, 75596210 + ... + 75596411.

It is an arithmetic number, because the mean of its divisors is an integer number (3855411861).

Almost surely, 2^15270454721 is an apocalyptic number.

It is an amenable number.

15270454721 is a deficient number, since it is larger than the sum of its proper divisors (151192723).

15270454721 is a wasteful number, since it uses less digits than its factorization.

15270454721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151192722.

The product of its (nonzero) digits is 78400, while the sum is 38.

The spelling of 15270454721 in words is "fifteen billion, two hundred seventy million, four hundred fifty-four thousand, seven hundred twenty-one".