5155001721 has 24 divisors (see below), whose sum is σ = 7548780096. Its totient is φ = 3389546400.

The previous prime is 5155001671. The next prime is 5155001737. The reversal of 5155001721 is 1271005515.

5155001721 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 5155001721 - 2²¹ = 5152904569 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5155001741) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 228286 + ... + 249848.

It is an arithmetic number, because the mean of its divisors is an integer number (314532504).

Almost surely, 2^5155001721 is an apocalyptic number.

It is an amenable number.

5155001721 is a deficient number, since it is larger than the sum of its proper divisors (2393778375).

5155001721 is a wasteful number, since it uses less digits than its factorization.

5155001721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21933 (or 21930 counting only the distinct ones).

The product of its (nonzero) digits is 1750, while the sum is 27.

The square root of 5155001721 is about 71798.3406563132. The cubic root of 5155001721 is about 1727.4663839489.

The spelling of 5155001721 in words is "five billion, one hundred fifty-five million, one thousand, seven hundred twenty-one".