51904149 has 8 divisors (see below), whose sum is σ = 75496992. Its totient is φ = 31457040.

The previous prime is 51904117. The next prime is 51904157. The reversal of 51904149 is 94140915.

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

It is not a de Polignac number, because 51904149 - 2⁵ = 51904117 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 1572853 = 51904149 / (5 + 1 + 9 + 0 + 4 + 1 + 4 + 9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51904109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 786394 + ... + 786459.

It is an arithmetic number, because the mean of its divisors is an integer number (9437124).

Almost surely, 2^51904149 is an apocalyptic number.

It is an amenable number.

51904149 is a deficient number, since it is larger than the sum of its proper divisors (23592843).

51904149 is a wasteful number, since it uses less digits than its factorization.

51904149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1572867.

The product of its (nonzero) digits is 6480, while the sum is 33.

The square root of 51904149 is about 7204.4534143820. The cubic root of 51904149 is about 373.0216381345.

It can be divided in two parts, 5190 and 4149, that added together give a palindrome (9339).

The spelling of 51904149 in words is "fifty-one million, nine hundred four thousand, one hundred forty-nine".