213149610500 has 24 divisors (see below), whose sum is σ = 465518750424. Its totient is φ = 85259844000.

The previous prime is 213149610461. The next prime is 213149610503. The reversal of 213149610500 is 5016941312.

It can be written as a sum of positive squares in 4 ways, for example, as 16441394176 + 196708216324 = 128224^2 + 443518^2 .

It is not an unprimeable number, because it can be changed into a prime (213149610503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 213149111 + ... + 213150110.

It is an arithmetic number, because the mean of its divisors is an integer number (19396614601).

Almost surely, 2^213149610500 is an apocalyptic number.

213149610500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213149610500 is an abundant number, since it is smaller than the sum of its proper divisors (252369139924).

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

213149610500 is a wasteful number, since it uses less digits than its factorization.

213149610500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426299240 (or 426299228 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 32.

The spelling of 213149610500 in words is "two hundred thirteen billion, one hundred forty-nine million, six hundred ten thousand, five hundred".