15225723 has 6 divisors (see below), whose sum is σ = 21992724. Its totient is φ = 10150476.

The previous prime is 15225713. The next prime is 15225731. The reversal of 15225723 is 32752251.

It is not a de Polignac number, because 15225723 - 2²¹ = 13128571 is a prime.

It is not an unprimeable number, because it can be changed into a prime (15225713) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 845865 + ... + 845882.

It is an arithmetic number, because the mean of its divisors is an integer number (3665454).

Almost surely, 2^15225723 is an apocalyptic number.

15225723 is a deficient number, since it is larger than the sum of its proper divisors (6767001).

15225723 is a wasteful number, since it uses less digits than its factorization.

15225723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1691753 (or 1691750 counting only the distinct ones).

The product of its digits is 4200, while the sum is 27.

The square root of 15225723 is about 3902.0152485607. The cubic root of 15225723 is about 247.8521219948.

Adding to 15225723 its reverse (32752251), we get a palindrome (47977974).

The spelling of 15225723 in words is "fifteen million, two hundred twenty-five thousand, seven hundred twenty-three".