1971055715 has 16 divisors (see below), whose sum is σ = 2435730528. Its totient is φ = 1530337536.

The previous prime is 1971055711. The next prime is 1971055717. The reversal of 1971055715 is 5175501791.

It is a cyclic number.

It is not a de Polignac number, because 1971055715 - 2² = 1971055711 is a prime.

It is a super-2 number, since 2×1971055715² = 7770121263268322450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1971055711) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4559 + ... + 62951.

It is an arithmetic number, because the mean of its divisors is an integer number (152233158).

Almost surely, 2^1971055715 is an apocalyptic number.

1971055715 is a deficient number, since it is larger than the sum of its proper divisors (464674813).

1971055715 is a wasteful number, since it uses less digits than its factorization.

1971055715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58598.

The product of its (nonzero) digits is 55125, while the sum is 41.

The square root of 1971055715 is about 44396.5732348793. The cubic root of 1971055715 is about 1253.8135726987.

The spelling of 1971055715 in words is "one billion, nine hundred seventy-one million, fifty-five thousand, seven hundred fifteen".