101031563440 has 20 divisors (see below), whose sum is σ = 234898385184. Its totient is φ = 40412625344.

The previous prime is 101031563417. The next prime is 101031563441. The reversal of 101031563440 is 44365130101.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×101031563440² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 101031563399 and 101031563408.

It is not an unprimeable number, because it can be changed into a prime (101031563441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 631447192 + ... + 631447351.

Almost surely, 2^101031563440 is an apocalyptic number.

101031563440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101031563440 is an abundant number, since it is smaller than the sum of its proper divisors (133866821744).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

101031563440 is a wasteful number, since it uses less digits than its factorization.

101031563440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1262894556 (or 1262894550 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

Adding to 101031563440 its reverse (44365130101), we get a palindrome (145396693541).

The spelling of 101031563440 in words is "one hundred one billion, thirty-one million, five hundred sixty-three thousand, four hundred forty".