2631381 has 8 divisors (see below), whose sum is σ = 3525984. Its totient is φ = 1745520.

The previous prime is 2631347. The next prime is 2631401. The reversal of 2631381 is 1831362.

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

It is not a de Polignac number, because 2631381 - 2¹⁰ = 2630357 is a prime.

It is a super-2 number, since 2×2631381² = 13848331934322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2631281) 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, 1446 + ... + 2711.

It is an arithmetic number, because the mean of its divisors is an integer number (440748).

2^2631381 is an apocalyptic number.

It is an amenable number.

2631381 is a deficient number, since it is larger than the sum of its proper divisors (894603).

2631381 is a wasteful number, since it uses less digits than its factorization.

2631381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4371.

The product of its digits is 864, while the sum is 24.

The square root of 2631381 is about 1622.1531986838. The cubic root of 2631381 is about 138.0578942131.

The spelling of 2631381 in words is "two million, six hundred thirty-one thousand, three hundred eighty-one".