101311890 has 32 divisors (see below), whose sum is σ = 244226880. Its totient is φ = 26896704.

The previous prime is 101311871. The next prime is 101311897. The reversal of 101311890 is 98113101.

It is a self number, because there is not a number n which added to its sum of digits gives 101311890.

It is not an unprimeable number, because it can be changed into a prime (101311897) 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, 504 + ... + 14243.

It is an arithmetic number, because the mean of its divisors is an integer number (7632090).

Almost surely, 2^101311890 is an apocalyptic number.

101311890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

101311890 is an abundant number, since it is smaller than the sum of its proper divisors (142914990).

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

101311890 is a wasteful number, since it uses less digits than its factorization.

101311890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14986.

The product of its (nonzero) digits is 216, while the sum is 24.

The square root of 101311890 is about 10065.3807677604. The cubic root of 101311890 is about 466.1798227820.

Adding to 101311890 its reverse (98113101), we get a palindrome (199424991).

It can be divided in two parts, 101311 and 890, that added together give a palindrome (102201).

The spelling of 101311890 in words is "one hundred one million, three hundred eleven thousand, eight hundred ninety".