101155631 has 2 divisors, whose sum is σ = 101155632. Its totient is φ = 101155630.

The previous prime is 101155619. The next prime is 101155643. The reversal of 101155631 is 136551101.

It is a balanced prime because it is at equal distance from previous prime (101155619) and next prime (101155643).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101155631 is a prime.

It is a super-2 number, since 2×101155631² = 20464923366016322, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 101155597 and 101155606.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101155331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50577815 + 50577816.

It is an arithmetic number, because the mean of its divisors is an integer number (50577816).

Almost surely, 2^101155631 is an apocalyptic number.

101155631 is a deficient number, since it is larger than the sum of its proper divisors (1).

101155631 is an equidigital number, since it uses as much as digits as its factorization.

101155631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 450, while the sum is 23.

The square root of 101155631 is about 10057.6155722915. The cubic root of 101155631 is about 465.9400277098.

The spelling of 101155631 in words is "one hundred one million, one hundred fifty-five thousand, six hundred thirty-one".