51030155 has 8 divisors (see below), whose sum is σ = 66803184. Its totient is φ = 37112800.

The previous prime is 51030137. The next prime is 51030179. The reversal of 51030155 is 55103015.

It is a happy number.

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

It is not a de Polignac number, because 51030155 - 2⁸ = 51029899 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 463856 + ... + 463965.

It is an arithmetic number, because the mean of its divisors is an integer number (8350398).

Almost surely, 2^51030155 is an apocalyptic number.

51030155 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

51030155 is a deficient number, since it is larger than the sum of its proper divisors (15773029).

51030155 is a wasteful number, since it uses less digits than its factorization.

51030155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 927837.

The product of its (nonzero) digits is 375, while the sum is 20.

The square root of 51030155 is about 7143.5393888464. The cubic root of 51030155 is about 370.9160525257.

The spelling of 51030155 in words is "fifty-one million, thirty thousand, one hundred fifty-five".