2091925281 has 8 divisors (see below), whose sum is σ = 2791135744. Its totient is φ = 1393665840.

The previous prime is 2091925273. The next prime is 2091925301. The reversal of 2091925281 is 1825291902.

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

It is not a de Polignac number, because 2091925281 - 2³ = 2091925273 is a prime.

It is a super-2 number, since 2×2091925281² = 8752302762573857922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2091925981) 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, 232606 + ... + 241431.

It is an arithmetic number, because the mean of its divisors is an integer number (348891968).

Almost surely, 2^2091925281 is an apocalyptic number.

It is an amenable number.

2091925281 is a deficient number, since it is larger than the sum of its proper divisors (699210463).

2091925281 is a wasteful number, since it uses less digits than its factorization.

2091925281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475511.

The product of its (nonzero) digits is 25920, while the sum is 39.

The square root of 2091925281 is about 45737.5696883864. The cubic root of 2091925281 is about 1278.9357366546.

The spelling of 2091925281 in words is "two billion, ninety-one million, nine hundred twenty-five thousand, two hundred eighty-one".