51515149 has 16 divisors (see below), whose sum is σ = 62078976. Its totient is φ = 41814000.

The previous prime is 51515129. The next prime is 51515159. The reversal of 51515149 is 94151515.

It is a cyclic number.

It is not a de Polignac number, because 51515149 - 2⁷ = 51515021 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51515149.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51515129) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 7674 + ... + 12724.

It is an arithmetic number, because the mean of its divisors is an integer number (3879936).

Almost surely, 2^51515149 is an apocalyptic number.

It is an amenable number.

51515149 is a deficient number, since it is larger than the sum of its proper divisors (10563827).

51515149 is a wasteful number, since it uses less digits than its factorization.

51515149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5136.

The product of its digits is 4500, while the sum is 31.

The square root of 51515149 is about 7177.4054504396. The cubic root of 51515149 is about 372.0874197177.

The spelling of 51515149 in words is "fifty-one million, five hundred fifteen thousand, one hundred forty-nine".