381503435531 has 16 divisors (see below), whose sum is σ = 400224013440. Its totient is φ = 363228364800.

The previous prime is 381503435527. The next prime is 381503435641. The reversal of 381503435531 is 135534305183.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 381503435531 - 2² = 381503435527 is a prime.

It is a super-2 number, since 2×381503435531² (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 (381503431531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11337131 + ... + 11370731.

It is an arithmetic number, because the mean of its divisors is an integer number (25014000840).

Almost surely, 2^381503435531 is an apocalyptic number.

381503435531 is a deficient number, since it is larger than the sum of its proper divisors (18720577909).

381503435531 is a wasteful number, since it uses less digits than its factorization.

381503435531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40214.

The product of its (nonzero) digits is 324000, while the sum is 41.

The spelling of 381503435531 in words is "three hundred eighty-one billion, five hundred three million, four hundred thirty-five thousand, five hundred thirty-one".