101902381 has 16 divisors (see below), whose sum is σ = 119364480. Its totient is φ = 85190400.

The previous prime is 101902349. The next prime is 101902417. The reversal of 101902381 is 183209101.

It is a cyclic number.

It is not a de Polignac number, because 101902381 - 2⁵ = 101902349 is a prime.

It is a super-2 number, since 2×101902381² = 20768190506938322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101902331) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55681 + ... + 57481.

It is an arithmetic number, because the mean of its divisors is an integer number (7460280).

Almost surely, 2^101902381 is an apocalyptic number.

It is an amenable number.

101902381 is a deficient number, since it is larger than the sum of its proper divisors (17462099).

101902381 is a wasteful number, since it uses less digits than its factorization.

101902381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2004.

The product of its (nonzero) digits is 432, while the sum is 25.

The square root of 101902381 is about 10094.6709208374. The cubic root of 101902381 is about 467.0837703383.

The spelling of 101902381 in words is "one hundred one million, nine hundred two thousand, three hundred eighty-one".