213012555 has 48 divisors (see below), whose sum is σ = 398071584. Its totient is φ = 96983040.

The previous prime is 213012523. The next prime is 213012577. The reversal of 213012555 is 555210312.

It is a happy number.

It is not a de Polignac number, because 213012555 - 2⁵ = 213012523 is a prime.

It is a super-3 number, since 3×213012555³ (a number of 26 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 259045 + ... + 259865.

It is an arithmetic number, because the mean of its divisors is an integer number (8293158).

Almost surely, 2^213012555 is an apocalyptic number.

213012555 is a deficient number, since it is larger than the sum of its proper divisors (185059029).

213012555 is a wasteful number, since it uses less digits than its factorization.

213012555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1196 (or 1189 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 213012555 is about 14594.9496402009. The cubic root of 213012555 is about 597.2209956524.

Adding to 213012555 its reverse (555210312), we get a palindrome (768222867).

The spelling of 213012555 in words is "two hundred thirteen million, twelve thousand, five hundred fifty-five".