101612381 has 8 divisors (see below), whose sum is σ = 109509624. Its totient is φ = 93726720.

The previous prime is 101612353. The next prime is 101612411. The reversal of 101612381 is 183216101.

It can be written as a sum of positive squares in 4 ways, for example, as 931225 + 100681156 = 965^2 + 10034^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 101612381 - 2¹⁴ = 101595997 is a prime.

It is a super-2 number, since 2×101612381² = 20650151944978322, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101612341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26285 + ... + 29901.

It is an arithmetic number, because the mean of its divisors is an integer number (13688703).

Almost surely, 2^101612381 is an apocalyptic number.

It is an amenable number.

101612381 is a deficient number, since it is larger than the sum of its proper divisors (7897243).

101612381 is a wasteful number, since it uses less digits than its factorization.

101612381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5791.

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 101612381 is about 10080.2966722215. The cubic root of 101612381 is about 466.6402642092.

Adding to 101612381 its reverse (183216101), we get a palindrome (284828482).

The spelling of 101612381 in words is "one hundred one million, six hundred twelve thousand, three hundred eighty-one".