721020152 has 8 divisors (see below), whose sum is σ = 1351912800. Its totient is φ = 360510072.

The previous prime is 721020107. The next prime is 721020163. The reversal of 721020152 is 251020127.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45063752 + ... + 45063767.

It is an arithmetic number, because the mean of its divisors is an integer number (168989100).

Almost surely, 2^721020152 is an apocalyptic number.

It is an amenable number.

721020152 is a deficient number, since it is larger than the sum of its proper divisors (630892648).

721020152 is a wasteful number, since it uses less digits than its factorization.

721020152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90127525 (or 90127521 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 20.

The square root of 721020152 is about 26851.8184114223. The cubic root of 721020152 is about 896.7040563972.

Adding to 721020152 its reverse (251020127), we get a palindrome (972040279).

The spelling of 721020152 in words is "seven hundred twenty-one million, twenty thousand, one hundred fifty-two".