101640259 has 12 divisors (see below), whose sum is σ = 119172864. Its totient is φ = 86428944.

The previous prime is 101640257. The next prime is 101640269. The reversal of 101640259 is 952046101.

It is not a de Polignac number, because 101640259 - 2¹ = 101640257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101640251) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1944 + ... + 14389.

It is an arithmetic number, because the mean of its divisors is an integer number (9931072).

Almost surely, 2^101640259 is an apocalyptic number.

101640259 is a deficient number, since it is larger than the sum of its proper divisors (17532605).

101640259 is a wasteful number, since it uses less digits than its factorization.

101640259 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16474 (or 16467 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 101640259 is about 10081.6793739932. The cubic root of 101640259 is about 466.6829355439.

The spelling of 101640259 in words is "one hundred one million, six hundred forty thousand, two hundred fifty-nine".