6211321440 has 48 divisors (see below), whose sum is σ = 19565664048. Its totient is φ = 1656352256.

The previous prime is 6211321439. The next prime is 6211321453. The reversal of 6211321440 is 441231126.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 6211321440.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6469647 + ... + 6470606.

It is an arithmetic number, because the mean of its divisors is an integer number (407618001).

Almost surely, 2^6211321440 is an apocalyptic number.

6211321440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6211321440 is an abundant number, since it is smaller than the sum of its proper divisors (13354342608).

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

6211321440 is a wasteful number, since it uses less digits than its factorization.

6211321440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12940271 (or 12940263 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 6211321440 is about 78811.9371669038. The cubic root of 6211321440 is about 1838.2080695645.

Adding to 6211321440 its reverse (441231126), we get a palindrome (6652552566).

The spelling of 6211321440 in words is "six billion, two hundred eleven million, three hundred twenty-one thousand, four hundred forty".