381023431 has 8 divisors (see below), whose sum is σ = 417348720. Its totient is φ = 346243968.

The previous prime is 381023429. The next prime is 381023479. The reversal of 381023431 is 134320183.

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 381023431 - 2¹ = 381023429 is a prime.

It is a super-2 number, since 2×381023431² = 290357709942023522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 381023396 and 381023405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381023411) 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, 385941 + ... + 386926.

It is an arithmetic number, because the mean of its divisors is an integer number (52168590).

Almost surely, 2^381023431 is an apocalyptic number.

381023431 is a deficient number, since it is larger than the sum of its proper divisors (36325289).

381023431 is a wasteful number, since it uses less digits than its factorization.

381023431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 772913.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 381023431 is about 19519.8214899625. The cubic root of 381023431 is about 724.9653132830.

The spelling of 381023431 in words is "three hundred eighty-one million, twenty-three thousand, four hundred thirty-one".