11651015 has 4 divisors (see below), whose sum is σ = 13981224. Its totient is φ = 9320808.

The previous prime is 11650981. The next prime is 11651023. The reversal of 11651015 is 51015611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51015611 = 29 ⋅1759159.

It is a cyclic number.

It is not a de Polignac number, because 11651015 - 2¹² = 11646919 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1165097 + ... + 1165106.

It is an arithmetic number, because the mean of its divisors is an integer number (3495306).

Almost surely, 2^11651015 is an apocalyptic number.

11651015 is a deficient number, since it is larger than the sum of its proper divisors (2330209).

11651015 is an equidigital number, since it uses as much as digits as its factorization.

11651015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2330208.

The product of its (nonzero) digits is 150, while the sum is 20.

The square root of 11651015 is about 3413.3583169659. The cubic root of 11651015 is about 226.7016009689.

Adding to 11651015 its reverse (51015611), we get a palindrome (62666626).

The spelling of 11651015 in words is "eleven million, six hundred fifty-one thousand, fifteen".