194928551 has 8 divisors (see below), whose sum is σ = 196042704. Its totient is φ = 193818240.

The previous prime is 194928533. The next prime is 194928563. The reversal of 194928551 is 155829491.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 194928551 - 2¹⁰ = 194927527 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194928751) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 191921 + ... + 192933.

It is an arithmetic number, because the mean of its divisors is an integer number (24505338).

Almost surely, 2^194928551 is an apocalyptic number.

194928551 is a deficient number, since it is larger than the sum of its proper divisors (1114153).

194928551 is a wasteful number, since it uses less digits than its factorization.

194928551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1921.

The product of its digits is 129600, while the sum is 44.

The square root of 194928551 is about 13961.6815248021. The cubic root of 194928551 is about 579.8181663452.

The spelling of 194928551 in words is "one hundred ninety-four million, nine hundred twenty-eight thousand, five hundred fifty-one".