102250305261 has 16 divisors (see below), whose sum is σ = 163134390720. Its totient is φ = 62923264560.

The previous prime is 102250305257. The next prime is 102250305277. The reversal of 102250305261 is 162503052201.

It is a happy number.

102250305261 is a `hidden beast` number, since 102 + 2 + 5 + 0 + 30 + 526 + 1 = 666.

It is not a de Polignac number, because 102250305261 - 2² = 102250305257 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102250305461) 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, 145655355 + ... + 145656056.

It is an arithmetic number, because the mean of its divisors is an integer number (10195899420).

Almost surely, 2^102250305261 is an apocalyptic number.

It is an amenable number.

102250305261 is a deficient number, since it is larger than the sum of its proper divisors (60884085459).

102250305261 is a wasteful number, since it uses less digits than its factorization.

102250305261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291311433 (or 291311427 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

Adding to 102250305261 its reverse (162503052201), we get a palindrome (264753357462).

The spelling of 102250305261 in words is "one hundred two billion, two hundred fifty million, three hundred five thousand, two hundred sixty-one".