23115433215550 has 192 divisors, whose sum is σ = 47905013882880. Its totient is φ = 8245009543680.

The previous prime is 23115433215547. The next prime is 23115433215559. The reversal of 23115433215550 is 5551233451132.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23115433215559) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 998797279 + ... + 998820421.

It is an arithmetic number, because the mean of its divisors is an integer number (249505280640).

Almost surely, 2^{23115433215550} is an apocalyptic number.

23115433215550 is an abundant number, since it is smaller than the sum of its proper divisors (24789580667330).

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

23115433215550 is a wasteful number, since it uses less digits than its factorization.

23115433215550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23667 (or 23662 counting only the distinct ones).

The product of its (nonzero) digits is 270000, while the sum is 40.

Adding to 23115433215550 its reverse (5551233451132), we get a palindrome (28666666666682).

The spelling of 23115433215550 in words is "twenty-three trillion, one hundred fifteen billion, four hundred thirty-three million, two hundred fifteen thousand, five hundred fifty".