2353132721 has 12 divisors (see below), whose sum is σ = 2417686032. Its totient is φ = 2290260000.

The previous prime is 2353132709. The next prime is 2353132723. The reversal of 2353132721 is 1272313532.

It is a de Polignac number, because none of the positive numbers 2^k-2353132721 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2353132723) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 823946 + ... + 826796.

It is an arithmetic number, because the mean of its divisors is an integer number (201473836).

Almost surely, 2^2353132721 is an apocalyptic number.

It is an amenable number.

2353132721 is a deficient number, since it is larger than the sum of its proper divisors (64553311).

2353132721 is an equidigital number, since it uses as much as digits as its factorization.

2353132721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3424 (or 3383 counting only the distinct ones).

The product of its digits is 7560, while the sum is 29.

The square root of 2353132721 is about 48509.0993629030. The cubic root of 2353132721 is about 1330.0934076142.

The spelling of 2353132721 in words is "two billion, three hundred fifty-three million, one hundred thirty-two thousand, seven hundred twenty-one".