213391530 has 64 divisors (see below), whose sum is σ = 620784000. Its totient is φ = 51730560.

The previous prime is 213391517. The next prime is 213391537. The reversal of 213391530 is 35193312.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 213391494 and 213391503.

It is not an unprimeable number, because it can be changed into a prime (213391537) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32955 + ... + 38894.

It is an arithmetic number, because the mean of its divisors is an integer number (9699750).

Almost surely, 2^213391530 is an apocalyptic number.

213391530 is an abundant number, since it is smaller than the sum of its proper divisors (407392470).

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

213391530 is a wasteful number, since it uses less digits than its factorization.

213391530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71876 (or 71870 counting only the distinct ones).

The product of its (nonzero) digits is 2430, while the sum is 27.

The square root of 213391530 is about 14607.9269576487. The cubic root of 213391530 is about 597.5749618548.

The spelling of 213391530 in words is "two hundred thirteen million, three hundred ninety-one thousand, five hundred thirty".