2531047 has 4 divisors (see below), whose sum is σ = 2664280. Its totient is φ = 2397816.

The previous prime is 2531027. The next prime is 2531069. The reversal of 2531047 is 7401352.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2531047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2531017) 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, 66588 + ... + 66625.

It is an arithmetic number, because the mean of its divisors is an integer number (666070).

2^2531047 is an apocalyptic number.

2531047 is a deficient number, since it is larger than the sum of its proper divisors (133233).

2531047 is a wasteful number, since it uses less digits than its factorization.

2531047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133232.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 2531047 is about 1590.9264596454. The cubic root of 2531047 is about 136.2804011504.

Adding to 2531047 its reverse (7401352), we get a palindrome (9932399).

The spelling of 2531047 in words is "two million, five hundred thirty-one thousand, forty-seven".