213061501 has 4 divisors (see below), whose sum is σ = 213090912. Its totient is φ = 213032092.

The previous prime is 213061451. The next prime is 213061529. The reversal of 213061501 is 105160312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 213061501 - 2¹⁵ = 213028733 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 (213061571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4680 + ... + 21166.

It is an arithmetic number, because the mean of its divisors is an integer number (53272728).

Almost surely, 2^213061501 is an apocalyptic number.

It is an amenable number.

213061501 is a deficient number, since it is larger than the sum of its proper divisors (29411).

213061501 is a wasteful number, since it uses less digits than its factorization.

213061501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29410.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 213061501 is about 14596.6263567990. The cubic root of 213061501 is about 597.2667352728.

The spelling of 213061501 in words is "two hundred thirteen million, sixty-one thousand, five hundred one".