213540550 has 12 divisors (see below), whose sum is σ = 397185516. Its totient is φ = 85416200.

The previous prime is 213540541. The next prime is 213540559. The reversal of 213540550 is 55045312.

It is an interprime number because it is at equal distance from previous prime (213540541) and next prime (213540559).

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 (213540559) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2135356 + ... + 2135455.

It is an arithmetic number, because the mean of its divisors is an integer number (33098793).

Almost surely, 2^213540550 is an apocalyptic number.

213540550 is a deficient number, since it is larger than the sum of its proper divisors (183644966).

213540550 is a wasteful number, since it uses less digits than its factorization.

213540550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4270823 (or 4270818 counting only the distinct ones).

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

The square root of 213540550 is about 14613.0267227567. The cubic root of 213540550 is about 597.7140331348.

Adding to 213540550 its reverse (55045312), we get a palindrome (268585862).

The spelling of 213540550 in words is "two hundred thirteen million, five hundred forty thousand, five hundred fifty".