55969971 has 32 divisors (see below), whose sum is σ = 81768960. Its totient is φ = 33944064.

The previous prime is 55969957. The next prime is 55969987. The reversal of 55969971 is 17996955.

It is a happy number.

It is not a de Polignac number, because 55969971 - 2¹³ = 55961779 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55969951) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 165915 + ... + 166251.

It is an arithmetic number, because the mean of its divisors is an integer number (2555280).

Almost surely, 2^55969971 is an apocalyptic number.

55969971 is a deficient number, since it is larger than the sum of its proper divisors (25798989).

55969971 is a wasteful number, since it uses less digits than its factorization.

55969971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475.

The product of its digits is 765450, while the sum is 51.

The square root of 55969971 is about 7481.3081075438. The cubic root of 55969971 is about 382.5178393149.

The spelling of 55969971 in words is "fifty-five million, nine hundred sixty-nine thousand, nine hundred seventy-one".