214105978 has 4 divisors (see below), whose sum is σ = 321158970. Its totient is φ = 107052988.

The previous prime is 214105949. The next prime is 214105979. The reversal of 214105978 is 879501412.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 198161929 + 15944049 = 14077^2 + 3993^2 .

It is not an unprimeable number, because it can be changed into a prime (214105979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53526493 + ... + 53526496.

Almost surely, 2^214105978 is an apocalyptic number.

214105978 is a deficient number, since it is larger than the sum of its proper divisors (107052992).

214105978 is a wasteful number, since it uses less digits than its factorization.

214105978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107052991.

The product of its (nonzero) digits is 20160, while the sum is 37.

The square root of 214105978 is about 14632.3606434505. The cubic root of 214105978 is about 598.2411248948.

The spelling of 214105978 in words is "two hundred fourteen million, one hundred five thousand, nine hundred seventy-eight".