51248061 has 6 divisors (see below), whose sum is σ = 74024990. Its totient is φ = 34165368.

The previous prime is 51248051. The next prime is 51248089. The reversal of 51248061 is 16084215.

It can be written as a sum of positive squares in only one way, i.e., 50851161 + 396900 = 7131^2 + 630^2 .

It is not a de Polignac number, because 51248061 - 2²² = 47053757 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 (51248051) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2847106 + ... + 2847123.

Almost surely, 2^51248061 is an apocalyptic number.

It is an amenable number.

51248061 is a deficient number, since it is larger than the sum of its proper divisors (22776929).

51248061 is a wasteful number, since it uses less digits than its factorization.

51248061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5694235 (or 5694232 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 51248061 is about 7158.7751047229. The cubic root of 51248061 is about 371.4432575413.

The spelling of 51248061 in words is "fifty-one million, two hundred forty-eight thousand, sixty-one".