11455551 has 12 divisors (see below), whose sum is σ = 17117880. Its totient is φ = 7373520.

The previous prime is 11455547. The next prime is 11455559. The reversal of 11455551 is 15555411.

It is not a de Polignac number, because 11455551 - 2² = 11455547 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11455559) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21685 + ... + 22206.

It is an arithmetic number, because the mean of its divisors is an integer number (1426490).

Almost surely, 2^11455551 is an apocalyptic number.

11455551 is a deficient number, since it is larger than the sum of its proper divisors (5662329).

11455551 is a wasteful number, since it uses less digits than its factorization.

11455551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43926 (or 43923 counting only the distinct ones).

The product of its digits is 2500, while the sum is 27.

The square root of 11455551 is about 3384.6049991099. The cubic root of 11455551 is about 225.4266866227.

The spelling of 11455551 in words is "eleven million, four hundred fifty-five thousand, five hundred fifty-one".