2354721261 has 16 divisors (see below), whose sum is σ = 3153765888. Its totient is φ = 1562759600.

The previous prime is 2354721253. The next prime is 2354721263. The reversal of 2354721261 is 1621274532.

2354721261 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 2354721261 - 2³ = 2354721253 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2354721263) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1218466 + ... + 1220396.

It is an arithmetic number, because the mean of its divisors is an integer number (197110368).

Almost surely, 2^2354721261 is an apocalyptic number.

It is an amenable number.

2354721261 is a deficient number, since it is larger than the sum of its proper divisors (799044627).

2354721261 is a wasteful number, since it uses less digits than its factorization.

2354721261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3552.

The product of its digits is 20160, while the sum is 33.

The square root of 2354721261 is about 48525.4702295609. The cubic root of 2354721261 is about 1330.3926443558.

Adding to 2354721261 its reverse (1621274532), we get a palindrome (3975995793).

The spelling of 2354721261 in words is "two billion, three hundred fifty-four million, seven hundred twenty-one thousand, two hundred sixty-one".