23515315450 has 72 divisors (see below), whose sum is σ = 50904421596. Its totient is φ = 8047987200.

The previous prime is 23515315427. The next prime is 23515315489. The reversal of 23515315450 is 5451351532.

It can be written as a sum of positive squares in 6 ways, for example, as 14426171881 + 9089143569 = 120109^2 + 95337^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 11469 + ... + 217168.

Almost surely, 2^23515315450 is an apocalyptic number.

23515315450 is an abundant number, since it is smaller than the sum of its proper divisors (27389106146).

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

23515315450 is a wasteful number, since it uses less digits than its factorization.

23515315450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228688 (or 228672 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 34.

Adding to 23515315450 its reverse (5451351532), we get a palindrome (28966666982).

The spelling of 23515315450 in words is "twenty-three billion, five hundred fifteen million, three hundred fifteen thousand, four hundred fifty".