213657713481 has 16 divisors (see below), whose sum is σ = 304401715200. Its totient is φ = 132829832448.

The previous prime is 213657713473. The next prime is 213657713497. The reversal of 213657713481 is 184317756312.

It is not a de Polignac number, because 213657713481 - 2³ = 213657713473 is a prime.

It is a super-2 number, since 2×213657713481² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 213657713481.

It is not an unprimeable number, because it can be changed into a prime (213657713431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19211721 + ... + 19222838.

It is an arithmetic number, because the mean of its divisors is an integer number (19025107200).

Almost surely, 2^213657713481 is an apocalyptic number.

It is an amenable number.

213657713481 is a deficient number, since it is larger than the sum of its proper divisors (90744001719).

213657713481 is a wasteful number, since it uses less digits than its factorization.

213657713481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38434688.

The product of its digits is 846720, while the sum is 48.

The spelling of 213657713481 in words is "two hundred thirteen billion, six hundred fifty-seven million, seven hundred thirteen thousand, four hundred eighty-one".