11145015431 has 32 divisors (see below), whose sum is σ = 13123731456. Its totient is φ = 9351360000.

The previous prime is 11145015419. The next prime is 11145015439. The reversal of 11145015431 is 13451054111.

It is not a de Polignac number, because 11145015431 - 2¹⁰ = 11145014407 is a prime.

It is a super-2 number, since 2×11145015431² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11145015431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11145015439) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4367606 + ... + 4370156.

It is an arithmetic number, because the mean of its divisors is an integer number (410116608).

Almost surely, 2^11145015431 is an apocalyptic number.

11145015431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11145015431 is a deficient number, since it is larger than the sum of its proper divisors (1978716025).

11145015431 is a wasteful number, since it uses less digits than its factorization.

11145015431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3023.

The product of its (nonzero) digits is 1200, while the sum is 26.

Adding to 11145015431 its reverse (13451054111), we get a palindrome (24596069542).

The spelling of 11145015431 in words is "eleven billion, one hundred forty-five million, fifteen thousand, four hundred thirty-one".