2354321981 has 8 divisors (see below), whose sum is σ = 2581390944. Its totient is φ = 2129426320.

The previous prime is 2354321971. The next prime is 2354321989. The reversal of 2354321981 is 1891234532.

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 2354321981 - 2¹⁰ = 2354320957 is a prime.

It is a super-2 number, since 2×2354321981² = 11085663980439528722, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2354321989) 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, 541055 + ... + 545388.

It is an arithmetic number, because the mean of its divisors is an integer number (322673868).

Almost surely, 2^2354321981 is an apocalyptic number.

It is an amenable number.

2354321981 is a deficient number, since it is larger than the sum of its proper divisors (227068963).

2354321981 is a wasteful number, since it uses less digits than its factorization.

2354321981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1086651.

The product of its digits is 51840, while the sum is 38.

The square root of 2354321981 is about 48521.3559270555. The cubic root of 2354321981 is about 1330.3174437774.

The spelling of 2354321981 in words is "two billion, three hundred fifty-four million, three hundred twenty-one thousand, nine hundred eighty-one".