2365551 has 8 divisors (see below), whose sum is σ = 3504560. Its totient is φ = 1577016.

The previous prime is 2365547. The next prime is 2365553. The reversal of 2365551 is 1555632.

2365551 is a `hidden beast` number, since 2 + 3 + 655 + 5 + 1 = 666.

It is not a de Polignac number, because 2365551 - 2² = 2365547 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 87613 = 2365551 / (2 + 3 + 6 + 5 + 5 + 5 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2365553) 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, 43780 + ... + 43833.

It is an arithmetic number, because the mean of its divisors is an integer number (438070).

2^2365551 is an apocalyptic number.

2365551 is a deficient number, since it is larger than the sum of its proper divisors (1139009).

2365551 is an equidigital number, since it uses as much as digits as its factorization.

2365551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87622 (or 87616 counting only the distinct ones).

The product of its digits is 4500, while the sum is 27.

The square root of 2365551 is about 1538.0347850423. The cubic root of 2365551 is about 133.2429088283.

It can be divided in two parts, 2365 and 551, that added together give a square (2916 = 54²).

The spelling of 2365551 in words is "two million, three hundred sixty-five thousand, five hundred fifty-one".