23051511550 has 48 divisors (see below), whose sum is σ = 45163292400. Its totient is φ = 8729337600.

The previous prime is 23051511499. The next prime is 23051511551. The reversal of 23051511550 is 5511515032.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23051511551) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 1532466 + ... + 1547434.

It is an arithmetic number, because the mean of its divisors is an integer number (940901925).

Almost surely, 2^23051511550 is an apocalyptic number.

23051511550 is a deficient number, since it is larger than the sum of its proper divisors (22111780850).

23051511550 is a wasteful number, since it uses less digits than its factorization.

23051511550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16621 (or 16616 counting only the distinct ones).

The product of its (nonzero) digits is 3750, while the sum is 28.

The spelling of 23051511550 in words is "twenty-three billion, fifty-one million, five hundred eleven thousand, five hundred fifty".