3957052321 has 4 divisors (see below), whose sum is σ = 3957215044. Its totient is φ = 3956889600.

The previous prime is 3957052313. The next prime is 3957052331. The reversal of 3957052321 is 1232507593.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1194393600 + 2762658721 = 34560^2 + 52561^2 .

It is a cyclic number.

It is not a de Polignac number, because 3957052321 - 2³ = 3957052313 is a prime.

It is a super-2 number, since 2×3957052321² = 31316526142262974082, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3957052331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36720 + ... + 96241.

It is an arithmetic number, because the mean of its divisors is an integer number (989303761).

Almost surely, 2^3957052321 is an apocalyptic number.

It is an amenable number.

3957052321 is a deficient number, since it is larger than the sum of its proper divisors (162723).

3957052321 is a wasteful number, since it uses less digits than its factorization.

3957052321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162722.

The product of its (nonzero) digits is 56700, while the sum is 37.

The square root of 3957052321 is about 62905.1056830843. The cubic root of 3957052321 is about 1581.6993308064.

The spelling of 3957052321 in words is "three billion, nine hundred fifty-seven million, fifty-two thousand, three hundred twenty-one".