291325870081 has 4 divisors (see below), whose sum is σ = 294048541872. Its totient is φ = 288603198292.

The previous prime is 291325870027. The next prime is 291325870097. The reversal of 291325870081 is 180078523192.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 291325870081 - 2⁷ = 291325869953 is a prime.

It is a super-2 number, since 2×291325870081² (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 (291325870481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1361335735 + ... + 1361335948.

It is an arithmetic number, because the mean of its divisors is an integer number (73512135468).

It is a Proth number, since it is equal to 138915 ⋅ 2²¹ + 1 and 138915 < 2²¹.

Almost surely, 2^291325870081 is an apocalyptic number.

It is an amenable number.

291325870081 is a deficient number, since it is larger than the sum of its proper divisors (2722671791).

291325870081 is a wasteful number, since it uses less digits than its factorization.

291325870081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2722671790.

The product of its (nonzero) digits is 241920, while the sum is 46.

The spelling of 291325870081 in words is "two hundred ninety-one billion, three hundred twenty-five million, eight hundred seventy thousand, eighty-one".