21150162330257 has 4 divisors (see below), whose sum is σ = 21193238017776. Its totient is φ = 21107086642740.

The previous prime is 21150162330217. The next prime is 21150162330301. The reversal of 21150162330257 is 75203326105112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21150162330257 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21150162330257.

It is not an unprimeable number, because it can be changed into a prime (21150162330217) 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 3 ways as a sum of consecutive naturals, for example, 21537843023 + ... + 21537844004.

It is an arithmetic number, because the mean of its divisors is an integer number (5298309504444).

Almost surely, 2^{21150162330257} is an apocalyptic number.

It is an amenable number.

21150162330257 is a deficient number, since it is larger than the sum of its proper divisors (43075687519).

21150162330257 is an equidigital number, since it uses as much as digits as its factorization.

21150162330257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43075687518.

The product of its (nonzero) digits is 75600, while the sum is 38.

Adding to 21150162330257 its reverse (75203326105112), we get a palindrome (96353488435369).

The spelling of 21150162330257 in words is "twenty-one trillion, one hundred fifty billion, one hundred sixty-two million, three hundred thirty thousand, two hundred fifty-seven".