15520942 has 4 divisors (see below), whose sum is σ = 23281416. Its totient is φ = 7760470.

The previous prime is 15520927. The next prime is 15520943. The reversal of 15520942 is 24902551.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 15520942.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15520943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3880234 + ... + 3880237.

It is an arithmetic number, because the mean of its divisors is an integer number (5820354).

Almost surely, 2^15520942 is an apocalyptic number.

15520942 is a deficient number, since it is larger than the sum of its proper divisors (7760474).

15520942 is an equidigital number, since it uses as much as digits as its factorization.

15520942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7760473.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 15520942 is about 3939.6626759153. The cubic root of 15520942 is about 249.4437874280.

The spelling of 15520942 in words is "fifteen million, five hundred twenty thousand, nine hundred forty-two".