213154507 has 4 divisors (see below), whose sum is σ = 213499480. Its totient is φ = 212809536.

The previous prime is 213154489. The next prime is 213154519. The reversal of 213154507 is 705451312.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213154507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213154577) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 171558 + ... + 172795.

It is an arithmetic number, because the mean of its divisors is an integer number (53374870).

Almost surely, 2^213154507 is an apocalyptic number.

213154507 is a deficient number, since it is larger than the sum of its proper divisors (344973).

213154507 is an equidigital number, since it uses as much as digits as its factorization.

213154507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344972.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 213154507 is about 14599.8118823497. The cubic root of 213154507 is about 597.3536292898.

The spelling of 213154507 in words is "two hundred thirteen million, one hundred fifty-four thousand, five hundred seven".