381573123100 has 288 divisors, whose sum is σ = 942533424000. Its totient is φ = 133094707200.

The previous prime is 381573123073. The next prime is 381573123103. The reversal of 381573123100 is 1321375183.

It is a super-2 number, since 2×381573123100² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381573123103) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 637016601 + ... + 637017199.

It is an arithmetic number, because the mean of its divisors is an integer number (3272685500).

Almost surely, 2^381573123100 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 381573123100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (471266712000).

381573123100 is an abundant number, since it is smaller than the sum of its proper divisors (560960300900).

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

381573123100 is a wasteful number, since it uses less digits than its factorization.

381573123100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 993 (or 986 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 34.

Adding to 381573123100 its reverse (1321375183), we get a palindrome (382894498283).

The spelling of 381573123100 in words is "three hundred eighty-one billion, five hundred seventy-three million, one hundred twenty-three thousand, one hundred".