220309513 has 2 divisors, whose sum is σ = 220309514. Its totient is φ = 220309512.

The previous prime is 220309493. The next prime is 220309519. The reversal of 220309513 is 315903022.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 214563904 + 5745609 = 14648^2 + 2397^2 .

It is a cyclic number.

It is not a de Polignac number, because 220309513 - 2¹³ = 220301321 is a prime.

It is not a weakly prime, because it can be changed into another prime (220309519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110154756 + 110154757.

It is an arithmetic number, because the mean of its divisors is an integer number (110154757).

Almost surely, 2^220309513 is an apocalyptic number.

It is an amenable number.

220309513 is a deficient number, since it is larger than the sum of its proper divisors (1).

220309513 is an equidigital number, since it uses as much as digits as its factorization.

220309513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 220309513 is about 14842.8269881448. The cubic root of 220309513 is about 603.9640427478.

The spelling of 220309513 in words is "two hundred twenty million, three hundred nine thousand, five hundred thirteen".