15220235445 has 32 divisors (see below), whose sum is σ = 25217291520. Its totient is φ = 7829713920.

The previous prime is 15220235389. The next prime is 15220235453. The reversal of 15220235445 is 54453202251.

It is a happy number.

It is not a de Polignac number, because 15220235445 - 2¹¹ = 15220233397 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 431517 + ... + 465453.

It is an arithmetic number, because the mean of its divisors is an integer number (788040360).

Almost surely, 2^15220235445 is an apocalyptic number.

15220235445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

15220235445 is a deficient number, since it is larger than the sum of its proper divisors (9997056075).

15220235445 is a wasteful number, since it uses less digits than its factorization.

15220235445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35005.

The product of its (nonzero) digits is 48000, while the sum is 33.

Adding to 15220235445 its reverse (54453202251), we get a palindrome (69673437696).

The spelling of 15220235445 in words is "fifteen billion, two hundred twenty million, two hundred thirty-five thousand, four hundred forty-five".