1015520900731 has 2 divisors, whose sum is σ = 1015520900732. Its totient is φ = 1015520900730.

The previous prime is 1015520900729. The next prime is 1015520900773. The reversal of 1015520900731 is 1370090255101.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1015520900731 - 2¹ = 1015520900729 is a prime.

It is a super-2 number, since 2×1015520900731² (a number of 25 digits) contains 22 as substring.

Together with 1015520900729, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1015520900431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 507760450365 + 507760450366.

It is an arithmetic number, because the mean of its divisors is an integer number (507760450366).

Almost surely, 2^{1015520900731} is an apocalyptic number.

1015520900731 is a deficient number, since it is larger than the sum of its proper divisors (1).

1015520900731 is an equidigital number, since it uses as much as digits as its factorization.

1015520900731 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9450, while the sum is 34.

The spelling of 1015520900731 in words is "one trillion, fifteen billion, five hundred twenty million, nine hundred thousand, seven hundred thirty-one".