211513240 has 32 divisors (see below), whose sum is σ = 492318000. Its totient is φ = 81687424.

The previous prime is 211513231. The next prime is 211513241. The reversal of 211513240 is 42315112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211513241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90010 + ... + 92329.

Almost surely, 2^211513240 is an apocalyptic number.

211513240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211513240 is an abundant number, since it is smaller than the sum of its proper divisors (280804760).

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

211513240 is a wasteful number, since it uses less digits than its factorization.

211513240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182379 (or 182375 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 211513240 is about 14543.4947657019. The cubic root of 211513240 is about 595.8164908057.

Adding to 211513240 its reverse (42315112), we get a palindrome (253828352).

The spelling of 211513240 in words is "two hundred eleven million, five hundred thirteen thousand, two hundred forty".