15123297381 has 4 divisors (see below), whose sum is σ = 20164396512. Its totient is φ = 10082198252.

The previous prime is 15123297373. The next prime is 15123297403. The reversal of 15123297381 is 18379232151.

15123297381 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 a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 15123297381 - 2³ = 15123297373 is a prime.

It is a super-2 number, since 2×15123297381² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15123297881) 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, 2520549561 + ... + 2520549566.

It is an arithmetic number, because the mean of its divisors is an integer number (5041099128).

Almost surely, 2^15123297381 is an apocalyptic number.

It is an amenable number.

15123297381 is a deficient number, since it is larger than the sum of its proper divisors (5041099131).

15123297381 is an equidigital number, since it uses as much as digits as its factorization.

15123297381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5041099130.

The product of its digits is 90720, while the sum is 42.

The spelling of 15123297381 in words is "fifteen billion, one hundred twenty-three million, two hundred ninety-seven thousand, three hundred eighty-one".