15220542 has 48 divisors (see below), whose sum is σ = 33430320. Its totient is φ = 4603392.

The previous prime is 15220529. The next prime is 15220567. The reversal of 15220542 is 24502251.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 139584 + ... + 139692.

It is an arithmetic number, because the mean of its divisors is an integer number (696465).

Almost surely, 2^15220542 is an apocalyptic number.

15220542 is an abundant number, since it is smaller than the sum of its proper divisors (18209778).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15220542 is a wasteful number, since it uses less digits than its factorization.

15220542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205 (or 168 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 15220542 is about 3901.3513043560. The cubic root of 15220542 is about 247.8240058144.

Adding to 15220542 its reverse (24502251), we get a palindrome (39722793).

The spelling of 15220542 in words is "fifteen million, two hundred twenty thousand, five hundred forty-two".