402255109 has 2 divisors, whose sum is σ = 402255110. Its totient is φ = 402255108.

The previous prime is 402255053. The next prime is 402255131. The reversal of 402255109 is 901552204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 292068100 + 110187009 = 17090^2 + 10497^2 .

It is a cyclic number.

It is not a de Polignac number, because 402255109 - 2⁹ = 402254597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402255179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201127554 + 201127555.

It is an arithmetic number, because the mean of its divisors is an integer number (201127555).

Almost surely, 2^402255109 is an apocalyptic number.

It is an amenable number.

402255109 is a deficient number, since it is larger than the sum of its proper divisors (1).

402255109 is an equidigital number, since it uses as much as digits as its factorization.

402255109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 402255109 is about 20056.2984870090. The cubic root of 402255109 is about 738.1883545009.

The spelling of 402255109 in words is "four hundred two million, two hundred fifty-five thousand, one hundred nine".