15722215145 has 32 divisors (see below), whose sum is σ = 24586426368. Its totient is φ = 9366248448.

The previous prime is 15722215141. The next prime is 15722215151. The reversal of 15722215145 is 54151222751.

It is a cyclic number.

It is not a de Polignac number, because 15722215145 - 2² = 15722215141 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is not an unprimeable number, because it can be changed into a prime (15722215141) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1008569 + ... + 1024038.

It is an arithmetic number, because the mean of its divisors is an integer number (768325824).

Almost surely, 2^15722215145 is an apocalyptic number.

It is an amenable number.

15722215145 is a deficient number, since it is larger than the sum of its proper divisors (8864211223).

15722215145 is a wasteful number, since it uses less digits than its factorization.

15722215145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2032649.

The product of its digits is 28000, while the sum is 35.

Adding to 15722215145 its reverse (54151222751), we get a palindrome (69873437896).

The spelling of 15722215145 in words is "fifteen billion, seven hundred twenty-two million, two hundred fifteen thousand, one hundred forty-five".