213947461 has 32 divisors (see below), whose sum is σ = 274176000. Its totient is φ = 162397440.

The previous prime is 213947453. The next prime is 213947501. The reversal of 213947461 is 164749312.

It is a cyclic number.

It is not a de Polignac number, because 213947461 - 2³ = 213947453 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 213947461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213947401) 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, 420075 + ... + 420583.

It is an arithmetic number, because the mean of its divisors is an integer number (8568000).

Almost surely, 2^213947461 is an apocalyptic number.

It is an amenable number.

213947461 is a deficient number, since it is larger than the sum of its proper divisors (60228539).

213947461 is a wasteful number, since it uses less digits than its factorization.

213947461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 709.

The product of its digits is 36288, while the sum is 37.

The square root of 213947461 is about 14626.9429820452. The cubic root of 213947461 is about 598.0934491156.

The spelling of 213947461 in words is "two hundred thirteen million, nine hundred forty-seven thousand, four hundred sixty-one".