221332034257 has 4 divisors (see below), whose sum is σ = 222381001456. Its totient is φ = 220283067060.

The previous prime is 221332034251. The next prime is 221332034269. The reversal of 221332034257 is 752430233122.

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 not a de Polignac number, because 221332034257 - 2²³ = 221323645649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221332034251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 524483283 + ... + 524483704.

It is an arithmetic number, because the mean of its divisors is an integer number (55595250364).

Almost surely, 2^221332034257 is an apocalyptic number.

It is an amenable number.

221332034257 is a deficient number, since it is larger than the sum of its proper divisors (1048967199).

221332034257 is a wasteful number, since it uses less digits than its factorization.

221332034257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1048967198.

The product of its (nonzero) digits is 60480, while the sum is 34.

Adding to 221332034257 its reverse (752430233122), we get a palindrome (973762267379).

The spelling of 221332034257 in words is "two hundred twenty-one billion, three hundred thirty-two million, thirty-four thousand, two hundred fifty-seven".