2981531 has 8 divisors (see below), whose sum is σ = 3433440. Its totient is φ = 2536128.

The previous prime is 2981527. The next prime is 2981533. The reversal of 2981531 is 1351892.

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

It is not a de Polignac number, because 2981531 - 2² = 2981527 is a prime.

It is a super-2 number, since 2×2981531² = 17779054207922, 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 = 2981494 and 2981503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2981533) 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, 596 + ... + 2513.

It is an arithmetic number, because the mean of its divisors is an integer number (429180).

2^2981531 is an apocalyptic number.

2981531 is a deficient number, since it is larger than the sum of its proper divisors (451909).

2981531 is a wasteful number, since it uses less digits than its factorization.

2981531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3253.

The product of its digits is 2160, while the sum is 29.

The square root of 2981531 is about 1726.7110354660. The cubic root of 2981531 is about 143.9283819537.

The spelling of 2981531 in words is "two million, nine hundred eighty-one thousand, five hundred thirty-one".