11251515 has 64 divisors (see below), whose sum is σ = 21450240. Its totient is φ = 4976640.

The previous prime is 11251489. The next prime is 11251517. The reversal of 11251515 is 51515211.

It is not a de Polignac number, because 11251515 - 2⁶ = 11251451 is a prime.

11251515 is a modest number, since divided by 1515 gives 1125 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 11251491 and 11251500.

It is not an unprimeable number, because it can be changed into a prime (11251517) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 115947 + ... + 116043.

It is an arithmetic number, because the mean of its divisors is an integer number (335160).

Almost surely, 2^11251515 is an apocalyptic number.

11251515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11251515 is a deficient number, since it is larger than the sum of its proper divisors (10198725).

11251515 is a wasteful number, since it uses less digits than its factorization.

11251515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172.

The product of its digits is 250, while the sum is 21.

The square root of 11251515 is about 3354.3278015125. The cubic root of 11251515 is about 224.0802951404.

Adding to 11251515 its reverse (51515211), we get a palindrome (62766726).

The spelling of 11251515 in words is "eleven million, two hundred fifty-one thousand, five hundred fifteen".