23505221331551 has 8 divisors (see below), whose sum is σ = 23764532360400. Its totient is φ = 23247264407872.

The previous prime is 23505221331541. The next prime is 23505221331577. The reversal of 23505221331551 is 15513312250532.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 23505221331551 - 2³⁴ = 23488041462367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23505221331541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 338491385 + ... + 338560818.

It is an arithmetic number, because the mean of its divisors is an integer number (2970566545050).

Almost surely, 2^{23505221331551} is an apocalyptic number.

23505221331551 is a deficient number, since it is larger than the sum of its proper divisors (259311028849).

23505221331551 is a wasteful number, since it uses less digits than its factorization.

23505221331551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 677052585.

The product of its (nonzero) digits is 135000, while the sum is 38.

The spelling of 23505221331551 in words is "twenty-three trillion, five hundred five billion, two hundred twenty-one million, three hundred thirty-one thousand, five hundred fifty-one".