7221174412537 has 2 divisors, whose sum is σ = 7221174412538. Its totient is φ = 7221174412536.

The previous prime is 7221174412457. The next prime is 7221174412541. The reversal of 7221174412537 is 7352144711227.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4092605874361 + 3128568538176 = 2023019^2 + 1768776^2 .

It is a cyclic number.

It is not a de Polignac number, because 7221174412537 - 2¹⁹ = 7221173888249 is a prime.

It is not a weakly prime, because it can be changed into another prime (7221174410537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3610587206268 + 3610587206269.

It is an arithmetic number, because the mean of its divisors is an integer number (3610587206269).

Almost surely, 2^{7221174412537} is an apocalyptic number.

It is an amenable number.

7221174412537 is a deficient number, since it is larger than the sum of its proper divisors (1).

7221174412537 is an equidigital number, since it uses as much as digits as its factorization.

7221174412537 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 658560, while the sum is 46.

The spelling of 7221174412537 in words is "seven trillion, two hundred twenty-one billion, one hundred seventy-four million, four hundred twelve thousand, five hundred thirty-seven".