2055631 has 4 divisors (see below), whose sum is σ = 2074600. Its totient is φ = 2036664.

The previous prime is 2055611. The next prime is 2055637. The reversal of 2055631 is 1365502.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1365502 = 2 ⋅682751.

It is a cyclic number.

It is not a de Polignac number, because 2055631 - 2⁷ = 2055503 is a prime.

It is a super-2 number, since 2×2055631² = 8451237616322, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2055637) 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, 9321 + ... + 9538.

It is an arithmetic number, because the mean of its divisors is an integer number (518650).

2^2055631 is an apocalyptic number.

2055631 is a deficient number, since it is larger than the sum of its proper divisors (18969).

2055631 is a wasteful number, since it uses less digits than its factorization.

2055631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18968.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 2055631 is about 1433.7471883146. The cubic root of 2055631 is about 127.1496159710.

The spelling of 2055631 in words is "two million, fifty-five thousand, six hundred thirty-one".