102252155450 has 12 divisors (see below), whose sum is σ = 190189009230. Its totient is φ = 40900862160.

The previous prime is 102252155449. The next prime is 102252155477. The reversal of 102252155450 is 54551252201.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 53313424609 + 48938730841 = 230897^2 + 221221^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1022521505 + ... + 1022521604.

Almost surely, 2^102252155450 is an apocalyptic number.

102252155450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

102252155450 is a deficient number, since it is larger than the sum of its proper divisors (87936853780).

102252155450 is a wasteful number, since it uses less digits than its factorization.

102252155450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2045043121 (or 2045043116 counting only the distinct ones).

The product of its (nonzero) digits is 20000, while the sum is 32.

The spelling of 102252155450 in words is "one hundred two billion, two hundred fifty-two million, one hundred fifty-five thousand, four hundred fifty".