102831861 has 16 divisors (see below), whose sum is σ = 158372928. Its totient is φ = 58656000.

The previous prime is 102831853. The next prime is 102831863. The reversal of 102831861 is 168138201.

It is not a de Polignac number, because 102831861 - 2³ = 102831853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102831863) 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 in 15 ways as a sum of consecutive naturals, for example, 91090 + ... + 92211.

It is an arithmetic number, because the mean of its divisors is an integer number (9898308).

Almost surely, 2^102831861 is an apocalyptic number.

102831861 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

102831861 is a deficient number, since it is larger than the sum of its proper divisors (55541067).

102831861 is a wasteful number, since it uses less digits than its factorization.

102831861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183332.

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 102831861 is about 10140.6045677760. The cubic root of 102831861 is about 468.4996079965.

The spelling of 102831861 in words is "one hundred two million, eight hundred thirty-one thousand, eight hundred sixty-one".