213204154 has 4 divisors (see below), whose sum is σ = 319806234. Its totient is φ = 106602076.

The previous prime is 213204151. The next prime is 213204179. The reversal of 213204154 is 451402312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 150430225 + 62773929 = 12265^2 + 7923^2 .

It is a super-2 number, since 2×213204154² = 90912022565711432, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (213204151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53301037 + ... + 53301040.

Almost surely, 2^213204154 is an apocalyptic number.

213204154 is a deficient number, since it is larger than the sum of its proper divisors (106602080).

213204154 is a wasteful number, since it uses less digits than its factorization.

213204154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106602079.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 213204154 is about 14601.5120449904. The cubic root of 213204154 is about 597.4000033400.

Adding to 213204154 its reverse (451402312), we get a palindrome (664606466).

The spelling of 213204154 in words is "two hundred thirteen million, two hundred four thousand, one hundred fifty-four".