15225236 has 12 divisors (see below), whose sum is σ = 28693812. Its totient is φ = 7027008.

The previous prime is 15225233. The next prime is 15225239. The reversal of 15225236 is 63252251.

It is an interprime number because it is at equal distance from previous prime (15225233) and next prime (15225239).

It can be written as a sum of positive squares in 2 ways, for example, as 739600 + 14485636 = 860^2 + 3806^2 .

It is a super-2 number, since 2×15225236² = 463615622511392, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15225233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 146345 + ... + 146448.

It is an arithmetic number, because the mean of its divisors is an integer number (2391151).

Almost surely, 2^15225236 is an apocalyptic number.

It is an amenable number.

15225236 is a deficient number, since it is larger than the sum of its proper divisors (13468576).

15225236 is a wasteful number, since it uses less digits than its factorization.

15225236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292810 (or 292808 counting only the distinct ones).

The product of its digits is 3600, while the sum is 26.

The square root of 15225236 is about 3901.9528444101. The cubic root of 15225236 is about 247.8494794215.

Adding to 15225236 its reverse (63252251), we get a palindrome (78477487).

The spelling of 15225236 in words is "fifteen million, two hundred twenty-five thousand, two hundred thirty-six".