213598781397 has 24 divisors (see below), whose sum is σ = 326021280000. Its totient is φ = 134483757408.

The previous prime is 213598781393. The next prime is 213598781399. The reversal of 213598781397 is 793187895312.

213598781397 is a `hidden beast` number, since 2 + 1 + 3 + 598 + 7 + 8 + 1 + 39 + 7 = 666.

It is not a de Polignac number, because 213598781397 - 2² = 213598781393 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213598781393) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6514522 + ... + 6547227.

It is an arithmetic number, because the mean of its divisors is an integer number (13584220000).

Almost surely, 2^213598781397 is an apocalyptic number.

It is an amenable number.

213598781397 is a deficient number, since it is larger than the sum of its proper divisors (112422498603).

213598781397 is a wasteful number, since it uses less digits than its factorization.

213598781397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13061857 (or 13061854 counting only the distinct ones).

The product of its digits is 22861440, while the sum is 63.

The spelling of 213598781397 in words is "two hundred thirteen billion, five hundred ninety-eight million, seven hundred eighty-one thousand, three hundred ninety-seven".