1156217216731 has 2 divisors, whose sum is σ = 1156217216732. Its totient is φ = 1156217216730.

The previous prime is 1156217216653. The next prime is 1156217216743. The reversal of 1156217216731 is 1376127126511.

It is a strong prime.

It is an emirp because it is prime and its reverse (1376127126511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1156217216731 - 2¹³ = 1156217208539 is a prime.

It is a super-2 number, since 2×1156217216731² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1156217216131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 578108608365 + 578108608366.

It is an arithmetic number, because the mean of its divisors is an integer number (578108608366).

Almost surely, 2^{1156217216731} is an apocalyptic number.

1156217216731 is a deficient number, since it is larger than the sum of its proper divisors (1).

1156217216731 is an equidigital number, since it uses as much as digits as its factorization.

1156217216731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 105840, while the sum is 43.

The spelling of 1156217216731 in words is "one trillion, one hundred fifty-six billion, two hundred seventeen million, two hundred sixteen thousand, seven hundred thirty-one".