15231121741 has 4 divisors (see below), whose sum is σ = 16615769184. Its totient is φ = 13846474300.

The previous prime is 15231121739. The next prime is 15231121793. The reversal of 15231121741 is 14712113251.

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 15231121741 - 2¹ = 15231121739 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 (15231127741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 692323705 + ... + 692323726.

It is an arithmetic number, because the mean of its divisors is an integer number (4153942296).

Almost surely, 2^15231121741 is an apocalyptic number.

15231121741 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

15231121741 is a deficient number, since it is larger than the sum of its proper divisors (1384647443).

15231121741 is a wasteful number, since it uses less digits than its factorization.

15231121741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1384647442.

The product of its digits is 1680, while the sum is 28.

Adding to 15231121741 its reverse (14712113251), we get a palindrome (29943234992).

The spelling of 15231121741 in words is "fifteen billion, two hundred thirty-one million, one hundred twenty-one thousand, seven hundred forty-one".