700031221 has 2 divisors, whose sum is σ = 700031222. Its totient is φ = 700031220.

The previous prime is 700031201. The next prime is 700031251. The reversal of 700031221 is 122130007.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 440370225 + 259660996 = 20985^2 + 16114^2 .

It is a cyclic number.

It is not a de Polignac number, because 700031221 - 2⁷ = 700031093 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 700031195 and 700031204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (700031201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 350015610 + 350015611.

It is an arithmetic number, because the mean of its divisors is an integer number (350015611).

Almost surely, 2^700031221 is an apocalyptic number.

It is an amenable number.

700031221 is a deficient number, since it is larger than the sum of its proper divisors (1).

700031221 is an equidigital number, since it uses as much as digits as its factorization.

700031221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84, while the sum is 16.

The square root of 700031221 is about 26458.1031255077. The cubic root of 700031221 is about 887.9172021420.

Adding to 700031221 its reverse (122130007), we get a palindrome (822161228).

The spelling of 700031221 in words is "seven hundred million, thirty-one thousand, two hundred twenty-one".