11515381403 has 2 divisors, whose sum is σ = 11515381404. Its totient is φ = 11515381402.

The previous prime is 11515381363. The next prime is 11515381417. The reversal of 11515381403 is 30418351511.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11515381403 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11515381403.

It is not a weakly prime, because it can be changed into another prime (11515381453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5757690701 + 5757690702.

It is an arithmetic number, because the mean of its divisors is an integer number (5757690702).

Almost surely, 2^11515381403 is an apocalyptic number.

11515381403 is a deficient number, since it is larger than the sum of its proper divisors (1).

11515381403 is an equidigital number, since it uses as much as digits as its factorization.

11515381403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7200, while the sum is 32.

The spelling of 11515381403 in words is "eleven billion, five hundred fifteen million, three hundred eighty-one thousand, four hundred three".