381306250001 has 8 divisors (see below), whose sum is σ = 383888034600. Its totient is φ = 378724768128.

The previous prime is 381306249997. The next prime is 381306250027. The reversal of 381306250001 is 100052603183.

It is a Cunningham number, because it is equal to 617500²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 981192976 + 380325057025 = 31324^2 + 616705^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 381306250001 - 2² = 381306249997 is a prime.

It is a super-2 number, since 2×381306250001² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (381306250301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2827235 + ... + 2959031.

It is an arithmetic number, because the mean of its divisors is an integer number (47986004325).

Almost surely, 2^381306250001 is an apocalyptic number.

It is an amenable number.

381306250001 is a deficient number, since it is larger than the sum of its proper divisors (2581784599).

381306250001 is a wasteful number, since it uses less digits than its factorization.

381306250001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151363.

The product of its (nonzero) digits is 4320, while the sum is 29.

Adding to 381306250001 its reverse (100052603183), we get a palindrome (481358853184).

The spelling of 381306250001 in words is "three hundred eighty-one billion, three hundred six million, two hundred fifty thousand, one".