101287631 has 2 divisors, whose sum is σ = 101287632. Its totient is φ = 101287630.

The previous prime is 101287597. The next prime is 101287657. The reversal of 101287631 is 136782101.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 101287631 - 2⁶ = 101287567 is a prime.

It is a super-2 number, since 2×101287631² = 20518368387184322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 101287594 and 101287603.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101287531) 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, 50643815 + 50643816.

It is an arithmetic number, because the mean of its divisors is an integer number (50643816).

Almost surely, 2^101287631 is an apocalyptic number.

101287631 is a deficient number, since it is larger than the sum of its proper divisors (1).

101287631 is an equidigital number, since it uses as much as digits as its factorization.

101287631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 101287631 is about 10064.1756244613. The cubic root of 101287631 is about 466.1426110948.

The spelling of 101287631 in words is "one hundred one million, two hundred eighty-seven thousand, six hundred thirty-one".