213520151 has 4 divisors (see below), whose sum is σ = 229944792. Its totient is φ = 197095512.

The previous prime is 213520121. The next prime is 213520159. The reversal of 213520151 is 151025312.

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-213520151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213520159) 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, 8212301 + ... + 8212326.

It is an arithmetic number, because the mean of its divisors is an integer number (57486198).

Almost surely, 2^213520151 is an apocalyptic number.

213520151 is a deficient number, since it is larger than the sum of its proper divisors (16424641).

213520151 is a wasteful number, since it uses less digits than its factorization.

213520151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16424640.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 213520151 is about 14612.3287329570. The cubic root of 213520151 is about 597.6949998148.

Adding to 213520151 its reverse (151025312), we get a palindrome (364545463).

The spelling of 213520151 in words is "two hundred thirteen million, five hundred twenty thousand, one hundred fifty-one".