213149401 has 4 divisors (see below), whose sum is σ = 214327204. Its totient is φ = 211971600.

The previous prime is 213149399. The next prime is 213149407. The reversal of 213149401 is 104941312.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 15015625 + 198133776 = 3875^2 + 14076^2 .

It is a cyclic number.

It is not a de Polignac number, because 213149401 - 2¹ = 213149399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213149407) 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, 588630 + ... + 588991.

It is an arithmetic number, because the mean of its divisors is an integer number (53581801).

Almost surely, 2^213149401 is an apocalyptic number.

It is an amenable number.

213149401 is a deficient number, since it is larger than the sum of its proper divisors (1177803).

213149401 is a wasteful number, since it uses less digits than its factorization.

213149401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1177802.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 213149401 is about 14599.6370160357. The cubic root of 213149401 is about 597.3488594915.

The spelling of 213149401 in words is "two hundred thirteen million, one hundred forty-nine thousand, four hundred one".