214209523 has 4 divisors (see below), whose sum is σ = 233683128. Its totient is φ = 194735920.

The previous prime is 214209509. The next prime is 214209529. The reversal of 214209523 is 325902412.

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-214209523 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 214209491 and 214209500.

It is not an unprimeable number, because it can be changed into a prime (214209529) 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, 9736786 + ... + 9736807.

It is an arithmetic number, because the mean of its divisors is an integer number (58420782).

Almost surely, 2^214209523 is an apocalyptic number.

214209523 is a deficient number, since it is larger than the sum of its proper divisors (19473605).

214209523 is a wasteful number, since it uses less digits than its factorization.

214209523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19473604.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 214209523 is about 14635.8984350125. The cubic root of 214209523 is about 598.3375489410.

The spelling of 214209523 in words is "two hundred fourteen million, two hundred nine thousand, five hundred twenty-three".