15222140 has 24 divisors (see below), whose sum is σ = 33847632. Its totient is φ = 5730560.

The previous prime is 15222139. The next prime is 15222143. The reversal of 15222140 is 4122251.

15222140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15222143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22046 + ... + 22725.

It is an arithmetic number, because the mean of its divisors is an integer number (1410318).

Almost surely, 2^15222140 is an apocalyptic number.

15222140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15222140 is an abundant number, since it is smaller than the sum of its proper divisors (18625492).

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

15222140 is a wasteful number, since it uses less digits than its factorization.

15222140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44797 (or 44795 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 15222140 is about 3901.5560998145. The cubic root of 15222140 is about 247.8326784995.

Adding to 15222140 its reverse (4122251), we get a palindrome (19344391).

It can be divided in two parts, 15222 and 140, that multiplied together give a triangular number (2131080 = T₂₀₆₄).

The spelling of 15222140 in words is "fifteen million, two hundred twenty-two thousand, one hundred forty".