213969505 has 32 divisors (see below), whose sum is σ = 270978048. Its totient is φ = 162052800.

The previous prime is 213969493. The next prime is 213969527. The reversal of 213969505 is 505969312.

It is a happy number.

It is not a de Polignac number, because 213969505 - 2²³ = 205580897 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1633290 + ... + 1633420.

It is an arithmetic number, because the mean of its divisors is an integer number (8468064).

Almost surely, 2^213969505 is an apocalyptic number.

It is an amenable number.

213969505 is a deficient number, since it is larger than the sum of its proper divisors (57008543).

213969505 is a wasteful number, since it uses less digits than its factorization.

213969505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357.

The product of its (nonzero) digits is 72900, while the sum is 40.

The square root of 213969505 is about 14627.6965035511. The cubic root of 213969505 is about 598.1139898583.

The spelling of 213969505 in words is "two hundred thirteen million, nine hundred sixty-nine thousand, five hundred five".