213504550 has 48 divisors (see below), whose sum is σ = 463541760. Its totient is φ = 71638560.

The previous prime is 213504509. The next prime is 213504553. The reversal of 213504550 is 55405312.

213504550 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213504553) 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, 9961 + ... + 22939.

It is an arithmetic number, because the mean of its divisors is an integer number (9657120).

Almost surely, 2^213504550 is an apocalyptic number.

213504550 is an abundant number, since it is smaller than the sum of its proper divisors (250037210).

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

213504550 is a wasteful number, since it uses less digits than its factorization.

213504550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13045 (or 13040 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 213504550 is about 14611.7948931676. The cubic root of 213504550 is about 597.6804424584.

Adding to 213504550 its reverse (55405312), we get a palindrome (268909862).

The spelling of 213504550 in words is "two hundred thirteen million, five hundred four thousand, five hundred fifty".