11910551 has 2 divisors, whose sum is σ = 11910552. Its totient is φ = 11910550.

The previous prime is 11910529. The next prime is 11910601. The reversal of 11910551 is 15501911.

It is a weak prime.

It is an emirp because it is prime and its reverse (15501911) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11910551 - 2⁶ = 11910487 is a prime.

It is a super-2 number, since 2×11910551² = 283722450247202, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11916551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5955275 + 5955276.

It is an arithmetic number, because the mean of its divisors is an integer number (5955276).

Almost surely, 2^11910551 is an apocalyptic number.

11910551 is a deficient number, since it is larger than the sum of its proper divisors (1).

11910551 is an equidigital number, since it uses as much as digits as its factorization.

11910551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 225, while the sum is 23.

The square root of 11910551 is about 3451.1666143494. The cubic root of 11910551 is about 228.3725761785.

It can be divided in two parts, 119105 and 51, that multiplied together give a triangular number (6074355 = T₃₄₈₅).

The spelling of 11910551 in words is "eleven million, nine hundred ten thousand, five hundred fifty-one".