51545061 has 12 divisors (see below), whose sum is σ = 75675340. Its totient is φ = 33799680.

The previous prime is 51545059. The next prime is 51545069. The reversal of 51545061 is 16054515.

It is a happy number.

51545061 is a `hidden beast` number, since 5 + 154 + 506 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 864900 + 50680161 = 930^2 + 7119^2 .

It is not a de Polignac number, because 51545061 - 2¹ = 51545059 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51545069) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46396 + ... + 47493.

Almost surely, 2^51545061 is an apocalyptic number.

It is an amenable number.

51545061 is a deficient number, since it is larger than the sum of its proper divisors (24130279).

51545061 is a wasteful number, since it uses less digits than its factorization.

51545061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93956 (or 93953 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

The square root of 51545061 is about 7179.4889093862. The cubic root of 51545061 is about 372.1594226504.

Adding to 51545061 its reverse (16054515), we get a palindrome (67599576).

The spelling of 51545061 in words is "fifty-one million, five hundred forty-five thousand, sixty-one".