258172019 has 16 divisors (see below), whose sum is σ = 314849280. Its totient is φ = 206763840.

The previous prime is 258172009. The next prime is 258172027. The reversal of 258172019 is 910271852.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-258172019 is a prime.

It is a super-2 number, since 2×258172019² = 133305582789072722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 258172019.

It is not an unprimeable number, because it can be changed into a prime (258172009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3587 + ... + 23004.

It is an arithmetic number, because the mean of its divisors is an integer number (19678080).

Almost surely, 2^258172019 is an apocalyptic number.

258172019 is a deficient number, since it is larger than the sum of its proper divisors (56677261).

258172019 is a wasteful number, since it uses less digits than its factorization.

258172019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26690.

The product of its (nonzero) digits is 10080, while the sum is 35.

The square root of 258172019 is about 16067.7322295338. The cubic root of 258172019 is about 636.7511290531.

The spelling of 258172019 in words is "two hundred fifty-eight million, one hundred seventy-two thousand, nineteen".