51152461 has 4 divisors (see below), whose sum is σ = 52400124. Its totient is φ = 49904800.

The previous prime is 51152443. The next prime is 51152477. The reversal of 51152461 is 16425115.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12638025 + 38514436 = 3555^2 + 6206^2 .

It is a cyclic number.

It is not a de Polignac number, because 51152461 - 2²⁵ = 17598029 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 (51152401) 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 3 ways as a sum of consecutive naturals, for example, 623770 + ... + 623851.

It is an arithmetic number, because the mean of its divisors is an integer number (13100031).

Almost surely, 2^51152461 is an apocalyptic number.

It is an amenable number.

51152461 is a deficient number, since it is larger than the sum of its proper divisors (1247663).

51152461 is a wasteful number, since it uses less digits than its factorization.

51152461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1247662.

The product of its digits is 1200, while the sum is 25.

The square root of 51152461 is about 7152.0948679390. The cubic root of 51152461 is about 371.2121458454.

Adding to 51152461 its reverse (16425115), we get a palindrome (67577576).

The spelling of 51152461 in words is "fifty-one million, one hundred fifty-two thousand, four hundred sixty-one".