7250250721 has 4 divisors (see below), whose sum is σ = 8286000832. Its totient is φ = 6214500612.

The previous prime is 7250250713. The next prime is 7250250727. The reversal of 7250250721 is 1270520527.

7250250721 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1270520527 = 43 ⋅29546989.

It is a cyclic number.

It is not a de Polignac number, because 7250250721 - 2³ = 7250250713 is a prime.

It is a super-2 number, since 2×7250250721² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7250250727) 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, 517875045 + ... + 517875058.

It is an arithmetic number, because the mean of its divisors is an integer number (2071500208).

Almost surely, 2^7250250721 is an apocalyptic number.

It is an amenable number.

7250250721 is a deficient number, since it is larger than the sum of its proper divisors (1035750111).

7250250721 is a wasteful number, since it uses less digits than its factorization.

7250250721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1035750110.

The product of its (nonzero) digits is 9800, while the sum is 31.

The square root of 7250250721 is about 85148.4041013101. The cubic root of 7250250721 is about 1935.4606306329.

The spelling of 7250250721 in words is "seven billion, two hundred fifty million, two hundred fifty thousand, seven hundred twenty-one".