101551139 has 2 divisors, whose sum is σ = 101551140. Its totient is φ = 101551138.

The previous prime is 101551117. The next prime is 101551159. The reversal of 101551139 is 931155101.

It is a strong prime.

It is an emirp because it is prime and its reverse (931155101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 101551139 - 2¹⁶ = 101485603 is a prime.

It is not a weakly prime, because it can be changed into another prime (101551159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50775569 + 50775570.

It is an arithmetic number, because the mean of its divisors is an integer number (50775570).

Almost surely, 2^101551139 is an apocalyptic number.

101551139 is a deficient number, since it is larger than the sum of its proper divisors (1).

101551139 is an equidigital number, since it uses as much as digits as its factorization.

101551139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 675, while the sum is 26.

The square root of 101551139 is about 10077.2585061613. The cubic root of 101551139 is about 466.5464970060.

The spelling of 101551139 in words is "one hundred one million, five hundred fifty-one thousand, one hundred thirty-nine".