101143540 has 24 divisors (see below), whose sum is σ = 224896392. Its totient is φ = 38077440.

The previous prime is 101143529. The next prime is 101143571. The reversal of 101143540 is 45341101.

It can be written as a sum of positive squares in 4 ways, for example, as 13046544 + 88096996 = 3612^2 + 9386^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 148401 + ... + 149080.

It is an arithmetic number, because the mean of its divisors is an integer number (9370683).

Almost surely, 2^101143540 is an apocalyptic number.

101143540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101143540 is an abundant number, since it is smaller than the sum of its proper divisors (123752852).

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

101143540 is a wasteful number, since it uses less digits than its factorization.

101143540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297507 (or 297505 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 101143540 is about 10057.0144675246. The cubic root of 101143540 is about 465.9214625698.

Adding to 101143540 its reverse (45341101), we get a palindrome (146484641).

It can be divided in two parts, 1011 and 43540, that added together give a triangular number (44551 = T₂₉₈).

The spelling of 101143540 in words is "one hundred one million, one hundred forty-three thousand, five hundred forty".