213521701 has 8 divisors (see below), whose sum is σ = 215577344. Its totient is φ = 211474800.

The previous prime is 213521689. The next prime is 213521729. The reversal of 213521701 is 107125312.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 213521701 - 2⁵ = 213521669 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 (213521771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53491 + ... + 57343.

It is an arithmetic number, because the mean of its divisors is an integer number (26947168).

Almost surely, 2^213521701 is an apocalyptic number.

It is an amenable number.

213521701 is a deficient number, since it is larger than the sum of its proper divisors (2055643).

213521701 is a wasteful number, since it uses less digits than its factorization.

213521701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4371.

The product of its (nonzero) digits is 420, while the sum is 22.

The square root of 213521701 is about 14612.3817702659. The cubic root of 213521701 is about 597.6964460874.

The spelling of 213521701 in words is "two hundred thirteen million, five hundred twenty-one thousand, seven hundred one".