7250220557 has 2 divisors, whose sum is σ = 7250220558. Its totient is φ = 7250220556.

The previous prime is 7250220499. The next prime is 7250220569. The reversal of 7250220557 is 7550220527.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4244001316 + 3006219241 = 65146^2 + 54829^2 .

It is a cyclic number.

It is not a de Polignac number, because 7250220557 - 2⁶ = 7250220493 is a prime.

It is a super-3 number, since 3×7250220557³ (a number of 31 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7250220157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3625110278 + 3625110279.

It is an arithmetic number, because the mean of its divisors is an integer number (3625110279).

Almost surely, 2^7250220557 is an apocalyptic number.

It is an amenable number.

7250220557 is a deficient number, since it is larger than the sum of its proper divisors (1).

7250220557 is an equidigital number, since it uses as much as digits as its factorization.

7250220557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 49000, while the sum is 35.

The square root of 7250220557 is about 85148.2269750815. The cubic root of 7250220557 is about 1935.4579465273.

The spelling of 7250220557 in words is "seven billion, two hundred fifty million, two hundred twenty thousand, five hundred fifty-seven".