2153721351 has 8 divisors (see below), whose sum is σ = 2893549824. Its totient is φ = 1424853560.

The previous prime is 2153721343. The next prime is 2153721389. The reversal of 2153721351 is 1531273512.

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 2153721351 - 2³ = 2153721343 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2153721301) 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, 2739711 + ... + 2740496.

It is an arithmetic number, because the mean of its divisors is an integer number (361693728).

Almost surely, 2^2153721351 is an apocalyptic number.

2153721351 is a deficient number, since it is larger than the sum of its proper divisors (739828473).

2153721351 is a wasteful number, since it uses less digits than its factorization.

2153721351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5480341.

The product of its digits is 6300, while the sum is 30.

The square root of 2153721351 is about 46408.2034881765. The cubic root of 2153721351 is about 1291.4071041080.

Adding to 2153721351 its reverse (1531273512), we get a palindrome (3684994863).

The spelling of 2153721351 in words is "two billion, one hundred fifty-three million, seven hundred twenty-one thousand, three hundred fifty-one".