220507381 has 2 divisors, whose sum is σ = 220507382. Its totient is φ = 220507380.

The previous prime is 220507363. The next prime is 220507393. The reversal of 220507381 is 183705022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 207619281 + 12888100 = 14409^2 + 3590^2 .

It is a cyclic number.

It is not a de Polignac number, because 220507381 - 2⁵ = 220507349 is a prime.

It is a super-2 number, since 2×220507381² = 97247010150958322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220507321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110253690 + 110253691.

It is an arithmetic number, because the mean of its divisors is an integer number (110253691).

Almost surely, 2^220507381 is an apocalyptic number.

It is an amenable number.

220507381 is a deficient number, since it is larger than the sum of its proper divisors (1).

220507381 is an equidigital number, since it uses as much as digits as its factorization.

220507381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 220507381 is about 14849.4909340354. The cubic root of 220507381 is about 604.1448026798.

The spelling of 220507381 in words is "two hundred twenty million, five hundred seven thousand, three hundred eighty-one".