252291081 has 16 divisors (see below), whose sum is σ = 393821568. Its totient is φ = 140649600.

The previous prime is 252291043. The next prime is 252291103. The reversal of 252291081 is 180192252.

It is not a de Polignac number, because 252291081 - 2⁷ = 252290953 is a prime.

It is a super-2 number, since 2×252291081² = 127301579104297122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (252291001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 145650 + ... + 147371.

It is an arithmetic number, because the mean of its divisors is an integer number (24613848).

Almost surely, 2^252291081 is an apocalyptic number.

252291081 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

252291081 is a deficient number, since it is larger than the sum of its proper divisors (141530487).

252291081 is a wasteful number, since it uses less digits than its factorization.

252291081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293072.

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 252291081 is about 15883.6734101404. The cubic root of 252291081 is about 631.8790635779.

The spelling of 252291081 in words is "two hundred fifty-two million, two hundred ninety-one thousand, eighty-one".