2971552421 has 4 divisors (see below), whose sum is σ = 3013405344. Its totient is φ = 2929699500.

The previous prime is 2971552387. The next prime is 2971552433. The reversal of 2971552421 is 1242551792.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2971552421 - 2⁶ = 2971552357 is a prime.

It is a super-2 number, since 2×2971552421² = 17660247581501922482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2971552721) 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, 20926355 + ... + 20926496.

It is an arithmetic number, because the mean of its divisors is an integer number (753351336).

Almost surely, 2^2971552421 is an apocalyptic number.

It is an amenable number.

2971552421 is a deficient number, since it is larger than the sum of its proper divisors (41852923).

2971552421 is an equidigital number, since it uses as much as digits as its factorization.

2971552421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41852922.

The product of its digits is 50400, while the sum is 38.

The square root of 2971552421 is about 54511.9475069457. The cubic root of 2971552421 is about 1437.6763613337.

The spelling of 2971552421 in words is "two billion, nine hundred seventy-one million, five hundred fifty-two thousand, four hundred twenty-one".