15320220240 has 80 divisors (see below), whose sum is σ = 51145976448. Its totient is φ = 3771130368.

The previous prime is 15320220233. The next prime is 15320220241. The reversal of 15320220240 is 4202202351.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15320220241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2452044 + ... + 2458283.

Almost surely, 2^15320220240 is an apocalyptic number.

15320220240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15320220240 is an abundant number, since it is smaller than the sum of its proper divisors (35825756208).

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

15320220240 is a wasteful number, since it uses less digits than its factorization.

15320220240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4910356 (or 4910350 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

Adding to 15320220240 its reverse (4202202351), we get a palindrome (19522422591).

The spelling of 15320220240 in words is "fifteen billion, three hundred twenty million, two hundred twenty thousand, two hundred forty".