2264351981 has 4 divisors (see below), whose sum is σ = 2266219932. Its totient is φ = 2262484032.

The previous prime is 2264351917. The next prime is 2264351989. The reversal of 2264351981 is 1891534622.

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 1231308100 + 1033043881 = 35090^2 + 32141^2 .

It is a cyclic number.

It is not a de Polignac number, because 2264351981 - 2⁶ = 2264351917 is a prime.

It is a super-2 number, since 2×2264351981² = 10254579787717248722, 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 (2264351989) 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, 932156 + ... + 934581.

It is an arithmetic number, because the mean of its divisors is an integer number (566554983).

Almost surely, 2^2264351981 is an apocalyptic number.

It is an amenable number.

2264351981 is a deficient number, since it is larger than the sum of its proper divisors (1867951).

2264351981 is a wasteful number, since it uses less digits than its factorization.

2264351981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1867950.

The product of its digits is 103680, while the sum is 41.

The square root of 2264351981 is about 47585.2075859715. The cubic root of 2264351981 is about 1313.1509296797.

The spelling of 2264351981 in words is "two billion, two hundred sixty-four million, three hundred fifty-one thousand, nine hundred eighty-one".