213940140250 has 16 divisors (see below), whose sum is σ = 400495943016. Its totient is φ = 85576056000.

The previous prime is 213940140223. The next prime is 213940140251. The reversal of 213940140250 is 52041049312.

It can be written as a sum of positive squares in 4 ways, for example, as 127851298969 + 86088841281 = 357563^2 + 293409^2 .

It is a super-2 number, since 2×213940140250² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (213940140251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 427880031 + ... + 427880530.

Almost surely, 2^213940140250 is an apocalyptic number.

213940140250 is a deficient number, since it is larger than the sum of its proper divisors (186555802766).

213940140250 is an equidigital number, since it uses as much as digits as its factorization.

213940140250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 855760578 (or 855760568 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

Adding to 213940140250 its reverse (52041049312), we get a palindrome (265981189562).

The spelling of 213940140250 in words is "two hundred thirteen billion, nine hundred forty million, one hundred forty thousand, two hundred fifty".