100612531 has 4 divisors (see below), whose sum is σ = 100782792. Its totient is φ = 100442272.

The previous prime is 100612489. The next prime is 100612553. The reversal of 100612531 is 135216001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 135216001 = 307 ⋅440443.

It is a cyclic number.

It is not a de Polignac number, because 100612531 - 2¹⁵ = 100579763 is a prime.

It is a super-2 number, since 2×100612531² = 20245762788451922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100612499 and 100612508.

It is not an unprimeable number, because it can be changed into a prime (100612591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84241 + ... + 85426.

It is an arithmetic number, because the mean of its divisors is an integer number (25195698).

Almost surely, 2^100612531 is an apocalyptic number.

100612531 is a deficient number, since it is larger than the sum of its proper divisors (170261).

100612531 is an equidigital number, since it uses as much as digits as its factorization.

100612531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170260.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 100612531 is about 10030.5797938105. The cubic root of 100612531 is about 465.1046606055.

Adding to 100612531 its reverse (135216001), we get a palindrome (235828532).

The spelling of 100612531 in words is "one hundred million, six hundred twelve thousand, five hundred thirty-one".