3971432215 has 8 divisors (see below), whose sum is σ = 4832841888. Its totient is φ = 3132396960.

The previous prime is 3971432209. The next prime is 3971432219. The reversal of 3971432215 is 5122341793.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3971432215 - 2³ = 3971432207 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 (3971432219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5593212 + ... + 5593921.

It is an arithmetic number, because the mean of its divisors is an integer number (604105236).

Almost surely, 2^3971432215 is an apocalyptic number.

3971432215 is a deficient number, since it is larger than the sum of its proper divisors (861409673).

3971432215 is a wasteful number, since it uses less digits than its factorization.

3971432215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11187209.

The product of its digits is 45360, while the sum is 37.

The square root of 3971432215 is about 63019.3003372776. The cubic root of 3971432215 is about 1583.6129751939.

The spelling of 3971432215 in words is "three billion, nine hundred seventy-one million, four hundred thirty-two thousand, two hundred fifteen".