1101131515 has 16 divisors (see below), whose sum is σ = 1442951136. Its totient is φ = 800006400.

The previous prime is 1101131513. The next prime is 1101131527. The reversal of 1101131515 is 5151311011.

It is not a de Polignac number, because 1101131515 - 2¹ = 1101131513 is a prime.

It is a super-2 number, since 2×1101131515² = 2424981226652390450, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1101131492 and 1101131501.

It is not an unprimeable number, because it can be changed into a prime (1101131513) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47125 + ... + 66505.

It is an arithmetic number, because the mean of its divisors is an integer number (90184446).

Almost surely, 2^1101131515 is an apocalyptic number.

1101131515 is a deficient number, since it is larger than the sum of its proper divisors (341819621).

1101131515 is a wasteful number, since it uses less digits than its factorization.

1101131515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20430.

The product of its (nonzero) digits is 75, while the sum is 19.

The square root of 1101131515 is about 33183.3017495246. The cubic root of 1101131515 is about 1032.6339458085.

Adding to 1101131515 its reverse (5151311011), we get a palindrome (6252442526).

It can be divided in two parts, 110113 and 1515, that added together give a triangular number (111628 = T₄₇₂).

The spelling of 1101131515 in words is "one billion, one hundred one million, one hundred thirty-one thousand, five hundred fifteen".