193231945 has 16 divisors (see below), whose sum is σ = 252157968. Its totient is φ = 141557760.

The previous prime is 193231933. The next prime is 193231963. The reversal of 193231945 is 549132391.

It can be written as a sum of positive squares in 8 ways, for example, as 13162384 + 180069561 = 3628^2 + 13419^2 .

It is not a de Polignac number, because 193231945 - 2⁷ = 193231817 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is an unprimeable number.

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, 27576 + ... + 33865.

It is an arithmetic number, because the mean of its divisors is an integer number (15759873).

Almost surely, 2^193231945 is an apocalyptic number.

It is an amenable number.

193231945 is a deficient number, since it is larger than the sum of its proper divisors (58926023).

193231945 is a wasteful number, since it uses less digits than its factorization.

193231945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61500.

The product of its digits is 29160, while the sum is 37.

The square root of 193231945 is about 13900.7893660756. The cubic root of 193231945 is about 578.1310680444.

The spelling of 193231945 in words is "one hundred ninety-three million, two hundred thirty-one thousand, nine hundred forty-five".