2157003452240 has 160 divisors (see below), whose sum is σ = 6173769186816. Its totient is φ = 682498897920.

The previous prime is 2157003452209. The next prime is 2157003452251. The reversal of 2157003452240 is 422543007512.

It is a super-2 number, since 2×2157003452240² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 2157003452240.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33914870 + ... + 33978410.

Almost surely, 2^{2157003452240} is an apocalyptic number.

2157003452240 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 2157003452240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3086884593408).

2157003452240 is an abundant number, since it is smaller than the sum of its proper divisors (4016765734576).

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

2157003452240 is a wasteful number, since it uses less digits than its factorization.

2157003452240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68237 (or 68231 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 35.

Adding to 2157003452240 its reverse (422543007512), we get a palindrome (2579546459752).

The spelling of 2157003452240 in words is "two trillion, one hundred fifty-seven billion, three million, four hundred fifty-two thousand, two hundred forty".