2551415 has 16 divisors (see below), whose sum is σ = 3265920. Its totient is φ = 1908000.

The previous prime is 2551403. The next prime is 2551421. The reversal of 2551415 is 5141552.

2551415 = 277² + 278² + ... + 306².

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-2551415 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10040 + ... + 10290.

It is an arithmetic number, because the mean of its divisors is an integer number (204120).

2^2551415 is an apocalyptic number.

2551415 is a deficient number, since it is larger than the sum of its proper divisors (714505).

2551415 is a wasteful number, since it uses less digits than its factorization.

2551415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382.

The product of its digits is 1000, while the sum is 23.

The square root of 2551415 is about 1597.3149345073. The cubic root of 2551415 is about 136.6449863157.

Adding to 2551415 its reverse (5141552), we get a palindrome (7692967).

It can be divided in two parts, 255 and 1415, that multiplied together give a triangular number (360825 = T₈₄₉).

The spelling of 2551415 in words is "two million, five hundred fifty-one thousand, four hundred fifteen".