195012221145 has 32 divisors (see below), whose sum is σ = 356830064640. Its totient is φ = 89089371840.

The previous prime is 195012221123. The next prime is 195012221149. The reversal of 195012221145 is 541122210591.

It is not a de Polignac number, because 195012221145 - 2⁶ = 195012221081 is a prime.

It is a super-2 number, since 2×195012221145² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (195012221149) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 455925 + ... + 773234.

It is an arithmetic number, because the mean of its divisors is an integer number (11150939520).

Almost surely, 2^195012221145 is an apocalyptic number.

195012221145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

195012221145 is a deficient number, since it is larger than the sum of its proper divisors (161817843495).

195012221145 is a wasteful number, since it uses less digits than its factorization.

195012221145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1230685.

The product of its (nonzero) digits is 7200, while the sum is 33.

The spelling of 195012221145 in words is "one hundred ninety-five billion, twelve million, two hundred twenty-one thousand, one hundred forty-five".