11951519 has 2 divisors, whose sum is σ = 11951520. Its totient is φ = 11951518.

The previous prime is 11951507. The next prime is 11951531. The reversal of 11951519 is 91515911.

It is a balanced prime because it is at equal distance from previous prime (11951507) and next prime (11951531).

It is a cyclic number.

It is not a de Polignac number, because 11951519 - 2⁴ = 11951503 is a prime.

It is a super-2 number, since 2×11951519² = 285677612814722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11953519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5975759 + 5975760.

It is an arithmetic number, because the mean of its divisors is an integer number (5975760).

Almost surely, 2^11951519 is an apocalyptic number.

11951519 is a deficient number, since it is larger than the sum of its proper divisors (1).

11951519 is an equidigital number, since it uses as much as digits as its factorization.

11951519 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2025, while the sum is 32.

The square root of 11951519 is about 3457.0969034726. The cubic root of 11951519 is about 228.6341163065.

The spelling of 11951519 in words is "eleven million, nine hundred fifty-one thousand, five hundred nineteen".