213565511403 has 12 divisors (see below), whose sum is σ = 314303960880. Its totient is φ = 139690648656.

The previous prime is 213565511359. The next prime is 213565511407. The reversal of 213565511403 is 304115565312.

213565511403 is a `hidden beast` number, since 2 + 1 + 3 + 565 + 51 + 1 + 40 + 3 = 666.

It is not a de Polignac number, because 213565511403 - 2¹² = 213565507307 is a prime.

It is a super-2 number, since 2×213565511403² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (213565511407) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 223862743 + ... + 223863696.

It is an arithmetic number, because the mean of its divisors is an integer number (26191996740).

Almost surely, 2^213565511403 is an apocalyptic number.

213565511403 is a deficient number, since it is larger than the sum of its proper divisors (100738449477).

213565511403 is a wasteful number, since it uses less digits than its factorization.

213565511403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447726498 (or 447726495 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

The spelling of 213565511403 in words is "two hundred thirteen billion, five hundred sixty-five million, five hundred eleven thousand, four hundred three".