15030671517481 has 3 divisors (see below), whose sum is σ = 15030675394423. Its totient is φ = 15030667640540.

The previous prime is 15030671517473. The next prime is 15030671517487. The reversal of 15030671517481 is 18471517603051.

The square root of 15030671517481 is 3876941.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 8634729357081 + 6395942160400 = 2938491^2 + 2529020^2 .

It is not a de Polignac number, because 15030671517481 - 2³ = 15030671517473 is a prime.

It is a super-2 number, since 2×15030671517481² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15030671517487) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1938471 + ... + 5815411.

Almost surely, 2^{15030671517481} is an apocalyptic number.

15030671517481 is the 3876941-st square number.

15030671517481 is the 1938471-st centered octagonal number.

It is an amenable number.

15030671517481 is a deficient number, since it is larger than the sum of its proper divisors (3876942).

15030671517481 is an frugal number, since it uses more digits than its factorization.

15030671517481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7753882 (or 3876941 counting only the distinct ones).

The product of its (nonzero) digits is 705600, while the sum is 49.

Multiplying 15030671517481 by its sum of digits (49), we get a square (736502904356569 = 27138587²).

The spelling of 15030671517481 in words is "fifteen trillion, thirty billion, six hundred seventy-one million, five hundred seventeen thousand, four hundred eighty-one".