23521521043 has 2 divisors, whose sum is σ = 23521521044. Its totient is φ = 23521521042.

The previous prime is 23521521013. The next prime is 23521521061. The reversal of 23521521043 is 34012512532.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23521521043 is a prime.

It is not a weakly prime, because it can be changed into another prime (23521521013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11760760521 + 11760760522.

It is an arithmetic number, because the mean of its divisors is an integer number (11760760522).

Almost surely, 2^23521521043 is an apocalyptic number.

23521521043 is a deficient number, since it is larger than the sum of its proper divisors (1).

23521521043 is an equidigital number, since it uses as much as digits as its factorization.

23521521043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7200, while the sum is 28.

The spelling of 23521521043 in words is "twenty-three billion, five hundred twenty-one million, five hundred twenty-one thousand, forty-three".