15313121220545 has 16 divisors (see below), whose sum is σ = 18547873827840. Its totient is φ = 12135749579904.

The previous prime is 15313121220443. The next prime is 15313121220629. The reversal of 15313121220545 is 54502212131351.

It is a cyclic number.

It is not a de Polignac number, because 15313121220545 - 2¹⁰ = 15313121219521 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27368096 + ... + 27922014.

It is an arithmetic number, because the mean of its divisors is an integer number (1159242114240).

Almost surely, 2^{15313121220545} is an apocalyptic number.

It is an amenable number.

15313121220545 is a deficient number, since it is larger than the sum of its proper divisors (3234752607295).

15313121220545 is a wasteful number, since it uses less digits than its factorization.

15313121220545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605704.

The product of its (nonzero) digits is 36000, while the sum is 35.

Adding to 15313121220545 its reverse (54502212131351), we get a palindrome (69815333351896).

The spelling of 15313121220545 in words is "fifteen trillion, three hundred thirteen billion, one hundred twenty-one million, two hundred twenty thousand, five hundred forty-five".