290241865081 has 9 divisors (see below), whose sum is σ = 337632678981. Its totient is φ = 248775509052.

The previous prime is 290241865063. The next prime is 290241865087. The reversal of 290241865081 is 180568142092.

The square root of 290241865081 is 538741.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 290241865081 - 2⁵ = 290241865049 is a prime.

It is a super-2 number, since 2×290241865081² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (290241865087) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3732706 + ... + 3809668.

It is an arithmetic number, because the mean of its divisors is an integer number (37514742109).

Almost surely, 2^290241865081 is an apocalyptic number.

290241865081 is the 538741-st square number.

290241865081 is the 269371-st centered octagonal number.

It is an amenable number.

290241865081 is a deficient number, since it is larger than the sum of its proper divisors (47390813900).

290241865081 is an frugal number, since it uses more digits than its factorization.

290241865081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153940 (or 76970 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 46.

The spelling of 290241865081 in words is "two hundred ninety billion, two hundred forty-one million, eight hundred sixty-five thousand, eighty-one".