381137233 has 4 divisors (see below), whose sum is σ = 382586688. Its totient is φ = 379687780.

The previous prime is 381137221. The next prime is 381137243. The reversal of 381137233 is 332731183.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 332731183 = 809 ⋅411287.

It is a cyclic number.

It is not a de Polignac number, because 381137233 - 2⁵ = 381137201 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 381137195 and 381137204.

It is not an unprimeable number, because it can be changed into a prime (381137203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 724333 + ... + 724858.

It is an arithmetic number, because the mean of its divisors is an integer number (95646672).

Almost surely, 2^381137233 is an apocalyptic number.

It is an amenable number.

381137233 is a deficient number, since it is larger than the sum of its proper divisors (1449455).

381137233 is a wasteful number, since it uses less digits than its factorization.

381137233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1449454.

The product of its digits is 9072, while the sum is 31.

The square root of 381137233 is about 19522.7363092370. The cubic root of 381137233 is about 725.0374823269.

The spelling of 381137233 in words is "three hundred eighty-one million, one hundred thirty-seven thousand, two hundred thirty-three".