101206531 has 2 divisors, whose sum is σ = 101206532. Its totient is φ = 101206530.

The previous prime is 101206513. The next prime is 101206561. The reversal of 101206531 is 135602101.

Together with previous prime (101206513) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is an emirp because it is prime and its reverse (135602101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 101206531 - 2¹¹ = 101204483 is a prime.

It is a super-2 number, since 2×101206531² = 20485523834107922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 101206499 and 101206508.

It is not a weakly prime, because it can be changed into another prime (101206561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50603265 + 50603266.

It is an arithmetic number, because the mean of its divisors is an integer number (50603266).

Almost surely, 2^101206531 is an apocalyptic number.

101206531 is a deficient number, since it is larger than the sum of its proper divisors (1).

101206531 is an equidigital number, since it uses as much as digits as its factorization.

101206531 is an evil number, because the sum of its binary digits is even.

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

The square root of 101206531 is about 10060.1456748896. The cubic root of 101206531 is about 466.0181659554.

Adding to 101206531 its reverse (135602101), we get a palindrome (236808632).

The spelling of 101206531 in words is "one hundred one million, two hundred six thousand, five hundred thirty-one".