2197454381 has 8 divisors (see below), whose sum is σ = 2289825720. Its totient is φ = 2106189568.

The previous prime is 2197454377. The next prime is 2197454471. The reversal of 2197454381 is 1834547912.

It can be written as a sum of positive squares in 4 ways, for example, as 119006281 + 2078448100 = 10909^2 + 45590^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 2197454381 - 2² = 2197454377 is a prime.

It is a super-2 number, since 2×2197454381² = 9657611513152186322, 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 (2197454681) 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, 272576 + ... + 280521.

It is an arithmetic number, because the mean of its divisors is an integer number (286228215).

Almost surely, 2^2197454381 is an apocalyptic number.

It is an amenable number.

2197454381 is a deficient number, since it is larger than the sum of its proper divisors (92371339).

2197454381 is a wasteful number, since it uses less digits than its factorization.

2197454381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553263.

The product of its digits is 241920, while the sum is 44.

The square root of 2197454381 is about 46877.0133540950. The cubic root of 2197454381 is about 1300.0896153213.

The spelling of 2197454381 in words is "two billion, one hundred ninety-seven million, four hundred fifty-four thousand, three hundred eighty-one".