213154605 has 64 divisors (see below), whose sum is σ = 398960640. Its totient is φ = 107939520.

The previous prime is 213154583. The next prime is 213154607. The reversal of 213154605 is 506451312.

213154605 is a `hidden beast` number, since 2 + 1 + 3 + 1 + 54 + 605 = 666.

It is not a de Polignac number, because 213154605 - 2⁵ = 213154573 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213154607) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4021759 + ... + 4021811.

It is an arithmetic number, because the mean of its divisors is an integer number (6233760).

Almost surely, 2^213154605 is an apocalyptic number.

It is an amenable number.

213154605 is a deficient number, since it is larger than the sum of its proper divisors (185806035).

213154605 is an frugal number, since it uses more digits than its factorization.

213154605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160 (or 92 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 213154605 is about 14599.8152385570. The cubic root of 213154605 is about 597.3537208363.

The spelling of 213154605 in words is "two hundred thirteen million, one hundred fifty-four thousand, six hundred five".