2211172253400 has 192 divisors, whose sum is σ = 7491077147520. Its totient is φ = 535088742400.

The previous prime is 2211172253369. The next prime is 2211172253431. The reversal of 2211172253400 is 43522711122.

It is an interprime number because it is at equal distance from previous prime (2211172253369) and next prime (2211172253431).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3418264 + ... + 4013336.

It is an arithmetic number, because the mean of its divisors is an integer number (39016026810).

Almost surely, 2^{2211172253400} is an apocalyptic number.

2211172253400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2211172253400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3745538573760).

2211172253400 is an abundant number, since it is smaller than the sum of its proper divisors (5279904894120).

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

2211172253400 is a wasteful number, since it uses less digits than its factorization.

2211172253400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 595666 (or 595657 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

Adding to 2211172253400 its reverse (43522711122), we get a palindrome (2254694964522).

The spelling of 2211172253400 in words is "two trillion, two hundred eleven billion, one hundred seventy-two million, two hundred fifty-three thousand, four hundred".