2071553021 has 4 divisors (see below), whose sum is σ = 2138377344. Its totient is φ = 2004728700.

The previous prime is 2071553009. The next prime is 2071553051. The reversal of 2071553021 is 1203551702.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1203551702 = 2 ⋅601775851.

It is a cyclic number.

It is not a de Polignac number, because 2071553021 - 2¹⁸ = 2071290877 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 (2071553051) 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, 33412115 + ... + 33412176.

It is an arithmetic number, because the mean of its divisors is an integer number (534594336).

Almost surely, 2^2071553021 is an apocalyptic number.

It is an amenable number.

2071553021 is a deficient number, since it is larger than the sum of its proper divisors (66824323).

2071553021 is an equidigital number, since it uses as much as digits as its factorization.

2071553021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66824322.

The product of its (nonzero) digits is 2100, while the sum is 26.

The square root of 2071553021 is about 45514.3166597061. The cubic root of 2071553021 is about 1274.7705384321.

The spelling of 2071553021 in words is "two billion, seventy-one million, five hundred fifty-three thousand, twenty-one".