1971220675 has 12 divisors (see below), whose sum is σ = 2444961816. Its totient is φ = 1576558400.

The previous prime is 1971220639. The next prime is 1971220697. The reversal of 1971220675 is 5760221791.

It is not a de Polignac number, because 1971220675 - 2²⁵ = 1937666243 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 115440 + ... + 131410.

It is an arithmetic number, because the mean of its divisors is an integer number (203746818).

Almost surely, 2^1971220675 is an apocalyptic number.

1971220675 is a deficient number, since it is larger than the sum of its proper divisors (473741141).

1971220675 is a wasteful number, since it uses less digits than its factorization.

1971220675 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20918 (or 20913 counting only the distinct ones).

The product of its (nonzero) digits is 52920, while the sum is 40.

The square root of 1971220675 is about 44398.4309970521. The cubic root of 1971220675 is about 1253.8485494400.

The spelling of 1971220675 in words is "one billion, nine hundred seventy-one million, two hundred twenty thousand, six hundred seventy-five".