2651531 has 4 divisors (see below), whose sum is σ = 2723232. Its totient is φ = 2579832.

The previous prime is 2651513. The next prime is 2651549. The reversal of 2651531 is 1351562.

2651531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1351562 = 2 ⋅675781.

It is an interprime number because it is at equal distance from previous prime (2651513) and next prime (2651549).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2651531 is a prime.

It is a super-2 number, since 2×2651531² = 14061233287922, 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 = 2651497 and 2651506.

It is not an unprimeable number, because it can be changed into a prime (2651501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35795 + ... + 35868.

It is an arithmetic number, because the mean of its divisors is an integer number (680808).

2^2651531 is an apocalyptic number.

2651531 is a deficient number, since it is larger than the sum of its proper divisors (71701).

2651531 is an equidigital number, since it uses as much as digits as its factorization.

2651531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71700.

The product of its digits is 900, while the sum is 23.

The square root of 2651531 is about 1628.3522346225. The cubic root of 2651531 is about 138.4093947925.

The spelling of 2651531 in words is "two million, six hundred fifty-one thousand, five hundred thirty-one".