213557693461 has 16 divisors (see below), whose sum is σ = 261560680704. Its totient is φ = 170358591744.

The previous prime is 213557693449. The next prime is 213557693467. The reversal of 213557693461 is 164396755312.

It is a cyclic number.

It is not a de Polignac number, because 213557693461 - 2¹⁹ = 213557169173 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213557693399 and 213557693408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213557693467) 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, 17918980 + ... + 17930893.

It is an arithmetic number, because the mean of its divisors is an integer number (16347542544).

Almost surely, 2^213557693461 is an apocalyptic number.

It is an amenable number.

213557693461 is a deficient number, since it is larger than the sum of its proper divisors (48002987243).

213557693461 is a wasteful number, since it uses less digits than its factorization.

213557693461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35849940.

The product of its digits is 4082400, while the sum is 52.

The spelling of 213557693461 in words is "two hundred thirteen billion, five hundred fifty-seven million, six hundred ninety-three thousand, four hundred sixty-one".