214521993 has 32 divisors (see below), whose sum is σ = 364369920. Its totient is φ = 122193360.

The previous prime is 214521991. The next prime is 214522003. The reversal of 214521993 is 399125412.

It is not a de Polignac number, because 214521993 - 2¹ = 214521991 is a prime.

It is not an unprimeable number, because it can be changed into a prime (214521991) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 63948 + ... + 67218.

It is an arithmetic number, because the mean of its divisors is an integer number (11386560).

Almost surely, 2^214521993 is an apocalyptic number.

It is an amenable number.

214521993 is a deficient number, since it is larger than the sum of its proper divisors (149847927).

214521993 is a wasteful number, since it uses less digits than its factorization.

214521993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3634 (or 3628 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The square root of 214521993 is about 14646.5693252720. The cubic root of 214521993 is about 598.6283416451.

The spelling of 214521993 in words is "two hundred fourteen million, five hundred twenty-one thousand, nine hundred ninety-three".