431221027 has 2 divisors, whose sum is σ = 431221028. Its totient is φ = 431221026.

The previous prime is 431221013. The next prime is 431221061. The reversal of 431221027 is 720122134.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 431221027 - 2¹⁵ = 431188259 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 431220989 and 431221007.

It is not a weakly prime, because it can be changed into another prime (431221327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215610513 + 215610514.

It is an arithmetic number, because the mean of its divisors is an integer number (215610514).

Almost surely, 2^431221027 is an apocalyptic number.

431221027 is a deficient number, since it is larger than the sum of its proper divisors (1).

431221027 is an equidigital number, since it uses as much as digits as its factorization.

431221027 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 431221027 is about 20765.8620577139. The cubic root of 431221027 is about 755.4979841137.

The spelling of 431221027 in words is "four hundred thirty-one million, two hundred twenty-one thousand, twenty-seven".