213187465 has 16 divisors (see below), whose sum is σ = 269070336. Its totient is φ = 161928000.

The previous prime is 213187453. The next prime is 213187477. The reversal of 213187465 is 564781312.

It is an interprime number because it is at equal distance from previous prime (213187453) and next prime (213187477).

It is not a de Polignac number, because 213187465 - 2⁵ = 213187433 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4761 + ... + 21190.

It is an arithmetic number, because the mean of its divisors is an integer number (16816896).

Almost surely, 2^213187465 is an apocalyptic number.

It is an amenable number.

213187465 is a deficient number, since it is larger than the sum of its proper divisors (55882871).

213187465 is a wasteful number, since it uses less digits than its factorization.

213187465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26040.

The product of its digits is 40320, while the sum is 37.

The square root of 213187465 is about 14600.9405518960. The cubic root of 213187465 is about 597.3844153560.

The spelling of 213187465 in words is "two hundred thirteen million, one hundred eighty-seven thousand, four hundred sixty-five".