10971551 has 4 divisors (see below), whose sum is σ = 11325504. Its totient is φ = 10617600.

The previous prime is 10971547. The next prime is 10971553. The reversal of 10971551 is 15517901.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 10971551 - 2² = 10971547 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10971553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 176930 + ... + 176991.

It is an arithmetic number, because the mean of its divisors is an integer number (2831376).

Almost surely, 2^10971551 is an apocalyptic number.

10971551 is a deficient number, since it is larger than the sum of its proper divisors (353953).

10971551 is an equidigital number, since it uses as much as digits as its factorization.

10971551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353952.

The product of its (nonzero) digits is 1575, while the sum is 29.

The square root of 10971551 is about 3312.3331656100. Note that the first 3 decimals coincide. The cubic root of 10971551 is about 222.2061162309.

The spelling of 10971551 in words is "ten million, nine hundred seventy-one thousand, five hundred fifty-one".