212145519 has 16 divisors (see below), whose sum is σ = 288157184. Its totient is φ = 138801600.

The previous prime is 212145509. The next prime is 212145529. The reversal of 212145519 is 915541212.

It is an interprime number because it is at equal distance from previous prime (212145509) and next prime (212145529).

It is not a de Polignac number, because 212145519 - 2⁴ = 212145503 is a prime.

It is a super-2 number, since 2×212145519² = 90011442463558722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212145509) 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, 43914 + ... + 48504.

It is an arithmetic number, because the mean of its divisors is an integer number (18009824).

Almost surely, 2^212145519 is an apocalyptic number.

212145519 is a deficient number, since it is larger than the sum of its proper divisors (76011665).

212145519 is a wasteful number, since it uses less digits than its factorization.

212145519 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4878.

The product of its digits is 3600, while the sum is 30.

The square root of 212145519 is about 14565.2160643088. The cubic root of 212145519 is about 596.4095939405.

The spelling of 212145519 in words is "two hundred twelve million, one hundred forty-five thousand, five hundred nineteen".