221150431 has 2 divisors, whose sum is σ = 221150432. Its totient is φ = 221150430.

The previous prime is 221150411. The next prime is 221150441. The reversal of 221150431 is 134051122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221150431 - 2²³ = 212761823 is a prime.

It is a super-2 number, since 2×221150431² = 97815026262971522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221150399 and 221150408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221150411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110575215 + 110575216.

It is an arithmetic number, because the mean of its divisors is an integer number (110575216).

Almost surely, 2^221150431 is an apocalyptic number.

221150431 is a deficient number, since it is larger than the sum of its proper divisors (1).

221150431 is an equidigital number, since it uses as much as digits as its factorization.

221150431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 221150431 is about 14871.1274286787. The cubic root of 221150431 is about 604.7315075740.

The spelling of 221150431 in words is "two hundred twenty-one million, one hundred fifty thousand, four hundred thirty-one".