213553597506 has 32 divisors (see below), whose sum is σ = 460053762048. Its totient is φ = 65893114320.

The previous prime is 213553597501. The next prime is 213553597511. The reversal of 213553597506 is 605795355312.

It is an interprime number because it is at equal distance from previous prime (213553597501) and next prime (213553597511).

It is not an unprimeable number, because it can be changed into a prime (213553597501) 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, 24955236 + ... + 24963791.

It is an arithmetic number, because the mean of its divisors is an integer number (14376680064).

Almost surely, 2^213553597506 is an apocalyptic number.

213553597506 is an abundant number, since it is smaller than the sum of its proper divisors (246500164542).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

213553597506 is a wasteful number, since it uses less digits than its factorization.

213553597506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49919086.

The product of its (nonzero) digits is 4252500, while the sum is 51.

The spelling of 213553597506 in words is "two hundred thirteen billion, five hundred fifty-three million, five hundred ninety-seven thousand, five hundred six".