1971915495 has 32 divisors (see below), whose sum is σ = 3450587904. Its totient is φ = 953664000.

The previous prime is 1971915479. The next prime is 1971915499. The reversal of 1971915495 is 5945191791.

It is not a de Polignac number, because 1971915495 - 2⁴ = 1971915479 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1971915499) 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, 51264 + ... + 81066.

It is an arithmetic number, because the mean of its divisors is an integer number (107830872).

Almost surely, 2^1971915495 is an apocalyptic number.

1971915495 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1971915495 is a deficient number, since it is larger than the sum of its proper divisors (1478672409).

1971915495 is a wasteful number, since it uses less digits than its factorization.

1971915495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30223.

The product of its digits is 510300, while the sum is 51.

The square root of 1971915495 is about 44406.2551337084. The cubic root of 1971915495 is about 1253.9958518568.

The spelling of 1971915495 in words is "one billion, nine hundred seventy-one million, nine hundred fifteen thousand, four hundred ninety-five".