721115250233 has 4 divisors (see below), whose sum is σ = 824131714560. Its totient is φ = 618098785908.

The previous prime is 721115250217. The next prime is 721115250239. The reversal of 721115250233 is 332052511127.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 721115250233 - 2⁴ = 721115250217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 721115250233.

It is not an unprimeable number, because it can be changed into a prime (721115250239) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51508232153 + ... + 51508232166.

It is an arithmetic number, because the mean of its divisors is an integer number (206032928640).

Almost surely, 2^721115250233 is an apocalyptic number.

It is an amenable number.

721115250233 is a deficient number, since it is larger than the sum of its proper divisors (103016464327).

721115250233 is a wasteful number, since it uses less digits than its factorization.

721115250233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103016464326.

The product of its (nonzero) digits is 12600, while the sum is 32.

The spelling of 721115250233 in words is "seven hundred twenty-one billion, one hundred fifteen million, two hundred fifty thousand, two hundred thirty-three".