258721116 has 24 divisors (see below), whose sum is σ = 609908880. Its totient is φ = 85350912.

The previous prime is 258721109. The next prime is 258721123. The reversal of 258721116 is 611127852.

It is an interprime number because it is at equal distance from previous prime (258721109) and next prime (258721123).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 109971 + ... + 112298.

It is an arithmetic number, because the mean of its divisors is an integer number (25412870).

Almost surely, 2^258721116 is an apocalyptic number.

It is an amenable number.

258721116 is an abundant number, since it is smaller than the sum of its proper divisors (351187764).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

258721116 is a wasteful number, since it uses less digits than its factorization.

258721116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222373 (or 222371 counting only the distinct ones).

The product of its digits is 6720, while the sum is 33.

The square root of 258721116 is about 16084.8101014591. The cubic root of 258721116 is about 637.2022372598.

Adding to 258721116 its reverse (611127852), we get a palindrome (869848968).

The spelling of 258721116 in words is "two hundred fifty-eight million, seven hundred twenty-one thousand, one hundred sixteen".