9255520381 has 2 divisors, whose sum is σ = 9255520382. Its totient is φ = 9255520380.

The previous prime is 9255520361. The next prime is 9255520427. The reversal of 9255520381 is 1830255529.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6098204281 + 3157316100 = 78091^2 + 56190^2 .

It is a cyclic number.

It is not a de Polignac number, because 9255520381 - 2¹¹ = 9255518333 is a prime.

It is a super-2 number, since 2×9255520381² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9255520361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4627760190 + 4627760191.

It is an arithmetic number, because the mean of its divisors is an integer number (4627760191).

Almost surely, 2^9255520381 is an apocalyptic number.

It is an amenable number.

9255520381 is a deficient number, since it is larger than the sum of its proper divisors (1).

9255520381 is an equidigital number, since it uses as much as digits as its factorization.

9255520381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108000, while the sum is 40.

The square root of 9255520381 is about 96205.6151219876. The cubic root of 9255520381 is about 2099.5857369542.

The spelling of 9255520381 in words is "nine billion, two hundred fifty-five million, five hundred twenty thousand, three hundred eighty-one".