1323273253400 has 144 divisors (see below), whose sum is σ = 3666205738440. Its totient is φ = 442627852800.

The previous prime is 1323273253373. The next prime is 1323273253403. The reversal of 1323273253400 is 43523723231.

It is a happy number.

It is a super-2 number, since 2×1323273253400² (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 congruent number.

It is not an unprimeable number, because it can be changed into a prime (1323273253403) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1244882 + ... + 2048481.

Almost surely, 2^{1323273253400} is an apocalyptic number.

1323273253400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1323273253400 is an abundant number, since it is smaller than the sum of its proper divisors (2342932485040).

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

1323273253400 is a wasteful number, since it uses less digits than its factorization.

1323273253400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3293434 (or 3293418 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 35.

Adding to 1323273253400 its reverse (43523723231), we get a palindrome (1366796976631).

The spelling of 1323273253400 in words is "one trillion, three hundred twenty-three billion, two hundred seventy-three million, two hundred fifty-three thousand, four hundred".