722134221157 has 2 divisors, whose sum is σ = 722134221158. Its totient is φ = 722134221156.

The previous prime is 722134221119. The next prime is 722134221161. The reversal of 722134221157 is 751122431227.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 384659203681 + 337475017476 = 620209^2 + 580926^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-722134221157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (722134221167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361067110578 + 361067110579.

It is an arithmetic number, because the mean of its divisors is an integer number (361067110579).

Almost surely, 2^722134221157 is an apocalyptic number.

It is an amenable number.

722134221157 is a deficient number, since it is larger than the sum of its proper divisors (1).

722134221157 is an equidigital number, since it uses as much as digits as its factorization.

722134221157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47040, while the sum is 37.

The spelling of 722134221157 in words is "seven hundred twenty-two billion, one hundred thirty-four million, two hundred twenty-one thousand, one hundred fifty-seven".