2240155681 has 2 divisors, whose sum is σ = 2240155682. Its totient is φ = 2240155680.

The previous prime is 2240155661. The next prime is 2240155693. The reversal of 2240155681 is 1865510422.

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., 1511965456 + 728190225 = 38884^2 + 26985^2 .

It is a cyclic number.

It is not a de Polignac number, because 2240155681 - 2¹³ = 2240147489 is a prime.

It is a super-2 number, since 2×2240155681² = 10036594950233147522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2240155661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1120077840 + 1120077841.

It is an arithmetic number, because the mean of its divisors is an integer number (1120077841).

Almost surely, 2^2240155681 is an apocalyptic number.

It is an amenable number.

2240155681 is a deficient number, since it is larger than the sum of its proper divisors (1).

2240155681 is an equidigital number, since it uses as much as digits as its factorization.

2240155681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19200, while the sum is 34.

The square root of 2240155681 is about 47330.2829169655. The cubic root of 2240155681 is about 1308.4568354491.

The spelling of 2240155681 in words is "two billion, two hundred forty million, one hundred fifty-five thousand, six hundred eighty-one".