101216540 has 12 divisors (see below), whose sum is σ = 212554776. Its totient is φ = 40486608.

The previous prime is 101216527. The next prime is 101216551. The reversal of 101216540 is 45612101.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 5060827 = 101216540 / (1 + 0 + 1 + 2 + 1 + 6 + 5 + 4 + 0).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2530394 + ... + 2530433.

It is an arithmetic number, because the mean of its divisors is an integer number (17712898).

Almost surely, 2^101216540 is an apocalyptic number.

101216540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101216540 is an abundant number, since it is smaller than the sum of its proper divisors (111338236).

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

101216540 is a wasteful number, since it uses less digits than its factorization.

101216540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5060836 (or 5060834 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 101216540 is about 10060.6431205962. The cubic root of 101216540 is about 466.0335280143.

Adding to 101216540 its reverse (45612101), we get a palindrome (146828641).

It can be divided in two parts, 10121 and 6540, that added together give a palindrome (16661).

The spelling of 101216540 in words is "one hundred one million, two hundred sixteen thousand, five hundred forty".