11515151230031 has 2 divisors, whose sum is σ = 11515151230032. Its totient is φ = 11515151230030.

The previous prime is 11515151229997. The next prime is 11515151230057. The reversal of 11515151230031 is 13003215151511.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11515151230031 - 2¹⁴ = 11515151213647 is a prime.

It is a super-2 number, since 2×11515151230031² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11515151229976 and 11515151230003.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11515151230061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5757575615015 + 5757575615016.

It is an arithmetic number, because the mean of its divisors is an integer number (5757575615016).

Almost surely, 2^{11515151230031} is an apocalyptic number.

11515151230031 is a deficient number, since it is larger than the sum of its proper divisors (1).

11515151230031 is an equidigital number, since it uses as much as digits as its factorization.

11515151230031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2250, while the sum is 29.

Adding to 11515151230031 its reverse (13003215151511), we get a palindrome (24518366381542).

The spelling of 11515151230031 in words is "eleven trillion, five hundred fifteen billion, one hundred fifty-one million, two hundred thirty thousand, thirty-one".