258721881 has 8 divisors (see below), whose sum is σ = 376322784. Its totient is φ = 156801120.

The previous prime is 258721831. The next prime is 258721891. The reversal of 258721881 is 188127852.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 258721881 - 2⁹ = 258721369 is a prime.

It is a super-2 number, since 2×258721881² = 133874023416356322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (258721811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3919996 + ... + 3920061.

It is an arithmetic number, because the mean of its divisors is an integer number (47040348).

Almost surely, 2^258721881 is an apocalyptic number.

It is an amenable number.

258721881 is a deficient number, since it is larger than the sum of its proper divisors (117600903).

258721881 is a wasteful number, since it uses less digits than its factorization.

258721881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7840071.

The product of its digits is 71680, while the sum is 42.

The square root of 258721881 is about 16084.8338816414. The cubic root of 258721881 is about 637.2028652967.

The spelling of 258721881 in words is "two hundred fifty-eight million, seven hundred twenty-one thousand, eight hundred eighty-one".