2651557 has 4 divisors (see below), whose sum is σ = 2743020. Its totient is φ = 2560096.

The previous prime is 2651549. The next prime is 2651569. The reversal of 2651557 is 7551562.

2651557 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: 7551562 = 2 ⋅3775781.

It can be written as a sum of positive squares in 2 ways, for example, as 799236 + 1852321 = 894^2 + 1361^2 .

It is a cyclic number.

It is not a de Polignac number, because 2651557 - 2³ = 2651549 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 (2652557) 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, 45688 + ... + 45745.

It is an arithmetic number, because the mean of its divisors is an integer number (685755).

2^2651557 is an apocalyptic number.

It is an amenable number.

2651557 is a deficient number, since it is larger than the sum of its proper divisors (91463).

2651557 is an equidigital number, since it uses as much as digits as its factorization.

2651557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91462.

The product of its digits is 10500, while the sum is 31.

The square root of 2651557 is about 1628.3602181336. The cubic root of 2651557 is about 138.4098471894.

The spelling of 2651557 in words is "two million, six hundred fifty-one thousand, five hundred fifty-seven".