221431350245057 has 4 divisors (see below), whose sum is σ = 221836160757936. Its totient is φ = 221026539732180.

The previous prime is 221431350245033. The next prime is 221431350245081. The reversal of 221431350245057 is 750542053134122.

It is a happy number.

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 an interprime number because it is at equal distance from previous prime (221431350245033) and next prime (221431350245081).

It is a cyclic number.

It is not a de Polignac number, because 221431350245057 - 2³² = 221427055277761 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221431350244999 and 221431350245017.

It is not an unprimeable number, because it can be changed into a prime (221431350245557) 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, 202405255619 + ... + 202405256712.

It is an arithmetic number, because the mean of its divisors is an integer number (55459040189484).

Almost surely, 2^{221431350245057} is an apocalyptic number.

It is an amenable number.

221431350245057 is a deficient number, since it is larger than the sum of its proper divisors (404810512879).

221431350245057 is an equidigital number, since it uses as much as digits as its factorization.

221431350245057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404810512878.

The product of its (nonzero) digits is 1008000, while the sum is 44.

The spelling of 221431350245057 in words is "two hundred twenty-one trillion, four hundred thirty-one billion, three hundred fifty million, two hundred forty-five thousand, fifty-seven".