211202431040 has 28 divisors (see below), whose sum is σ = 502925789676. Its totient is φ = 84480972288.

The previous prime is 211202431031. The next prime is 211202431043. The reversal of 211202431040 is 40134202112.

It can be written as a sum of positive squares in 2 ways, for example, as 30672618496 + 180529812544 = 175136^2 + 424888^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (211202431043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 330003479 + ... + 330004118.

Almost surely, 2^211202431040 is an apocalyptic number.

211202431040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211202431040 is an abundant number, since it is smaller than the sum of its proper divisors (291723358636).

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

211202431040 is an equidigital number, since it uses as much as digits as its factorization.

211202431040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660007614 (or 660007604 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 211202431040 its reverse (40134202112), we get a palindrome (251336633152).

The spelling of 211202431040 in words is "two hundred eleven billion, two hundred two million, four hundred thirty-one thousand, forty".