210521157 has 32 divisors (see below), whose sum is σ = 359430144. Its totient is φ = 106401600.

The previous prime is 210521107. The next prime is 210521173. The reversal of 210521157 is 751125012.

It is not a de Polignac number, because 210521157 - 2¹⁸ = 210259013 is a prime.

It is a super-3 number, since 3×210521157³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210521107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3769 + ... + 20862.

It is an arithmetic number, because the mean of its divisors is an integer number (11232192).

Almost surely, 2^210521157 is an apocalyptic number.

It is an amenable number.

210521157 is a deficient number, since it is larger than the sum of its proper divisors (148908987).

210521157 is a wasteful number, since it uses less digits than its factorization.

210521157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24689.

The product of its (nonzero) digits is 700, while the sum is 24.

The square root of 210521157 is about 14509.3472285972. The cubic root of 210521157 is about 594.8834901217.

Adding to 210521157 its reverse (751125012), we get a palindrome (961646169).

The spelling of 210521157 in words is "two hundred ten million, five hundred twenty-one thousand, one hundred fifty-seven".