381650631 has 8 divisors (see below), whose sum is σ = 516034944. Its totient is φ = 250850040.

The previous prime is 381650617. The next prime is 381650639. The reversal of 381650631 is 136056183.

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

It is not a de Polignac number, because 381650631 - 2⁶ = 381650567 is a prime.

It is a super-2 number, since 2×381650631² = 291314408285396322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 381650592 and 381650601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381650639) 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, 895681 + ... + 896106.

It is an arithmetic number, because the mean of its divisors is an integer number (64504368).

Almost surely, 2^381650631 is an apocalyptic number.

381650631 is a deficient number, since it is larger than the sum of its proper divisors (134384313).

381650631 is a wasteful number, since it uses less digits than its factorization.

381650631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1791861.

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 381650631 is about 19535.8806046720. The cubic root of 381650631 is about 725.3628819919.

The spelling of 381650631 in words is "three hundred eighty-one million, six hundred fifty thousand, six hundred thirty-one".