213397802500 has 45 divisors (see below), whose sum is σ = 466708829587. Its totient is φ = 85349882000.

The previous prime is 213397802479. The next prime is 213397802539. The reversal of 213397802500 is 5208793312.

The square root of 213397802500 is 461950.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 2 ways, for example, as 16730387716 + 196667414784 = 129346^2 + 443472^2 .

It is a super-2 number, since 2×213397802500² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 23092881 + ... + 23102119.

Almost surely, 2^213397802500 is an apocalyptic number.

213397802500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

213397802500 is the 461950-th square number.

It is an amenable number.

213397802500 is an abundant number, since it is smaller than the sum of its proper divisors (253311027087).

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

213397802500 is an frugal number, since it uses more digits than its factorization.

213397802500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18502 (or 9246 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 40.

The spelling of 213397802500 in words is "two hundred thirteen billion, three hundred ninety-seven million, eight hundred two thousand, five hundred".