11115620031 has 16 divisors (see below), whose sum is σ = 15262920704. Its totient is φ = 7190459424.

The previous prime is 11115620011. The next prime is 11115620057. The reversal of 11115620031 is 13002651111.

It is a happy number.

It is not a de Polignac number, because 11115620031 - 2¹⁰ = 11115619007 is a prime.

It is a super-2 number, since 2×11115620031² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11115620011) 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, 95695 + ... + 177168.

It is an arithmetic number, because the mean of its divisors is an integer number (953932544).

Almost surely, 2^11115620031 is an apocalyptic number.

11115620031 is a deficient number, since it is larger than the sum of its proper divisors (4147300673).

11115620031 is a wasteful number, since it uses less digits than its factorization.

11115620031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273270.

The product of its (nonzero) digits is 180, while the sum is 21.

The spelling of 11115620031 in words is "eleven billion, one hundred fifteen million, six hundred twenty thousand, thirty-one".