258138023 has 16 divisors (see below), whose sum is σ = 313055232. Its totient is φ = 209628000.

The previous prime is 258137983. The next prime is 258138029. The reversal of 258138023 is 320831852.

It is a cyclic number.

It is not a de Polignac number, because 258138023 - 2⁸ = 258137767 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (258138029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24683 + ... + 33548.

It is an arithmetic number, because the mean of its divisors is an integer number (19565952).

Almost surely, 2^258138023 is an apocalyptic number.

258138023 is a deficient number, since it is larger than the sum of its proper divisors (54917209).

258138023 is a wasteful number, since it uses less digits than its factorization.

258138023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58286.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 258138023 is about 16066.6742980618. The cubic root of 258138023 is about 636.7231787719.

Adding to 258138023 its reverse (320831852), we get a palindrome (578969875).

It can be divided in two parts, 2581 and 38023, that added together give a palindrome (40604).

The spelling of 258138023 in words is "two hundred fifty-eight million, one hundred thirty-eight thousand, twenty-three".