2373245721 has 72 divisors (see below), whose sum is σ = 4322223360. Its totient is φ = 1228296960.

The previous prime is 2373245717. The next prime is 2373245737. The reversal of 2373245721 is 1275423732.

It is not a de Polignac number, because 2373245721 - 2² = 2373245717 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2373245701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 3300400 + ... + 3301118.

It is an arithmetic number, because the mean of its divisors is an integer number (60030880).

Almost surely, 2^2373245721 is an apocalyptic number.

2373245721 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2373245721 is a deficient number, since it is larger than the sum of its proper divisors (1948977639).

2373245721 is a wasteful number, since it uses less digits than its factorization.

2373245721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1187 (or 1173 counting only the distinct ones).

The product of its digits is 70560, while the sum is 36.

The square root of 2373245721 is about 48715.9698764173. The cubic root of 2373245721 is about 1333.8722437287.

The spelling of 2373245721 in words is "two billion, three hundred seventy-three million, two hundred forty-five thousand, seven hundred twenty-one".