51742265 has 4 divisors (see below), whose sum is σ = 62090724. Its totient is φ = 41393808.

The previous prime is 51742261. The next prime is 51742267. The reversal of 51742265 is 56224715.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56224715 = 5 ⋅11244943.

It can be written as a sum of positive squares in 2 ways, for example, as 32126224 + 19616041 = 5668^2 + 4429^2 .

It is a cyclic number.

It is not a de Polignac number, because 51742265 - 2² = 51742261 is a prime.

It is a super-3 number, since 3×51742265³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51742261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5174222 + ... + 5174231.

It is an arithmetic number, because the mean of its divisors is an integer number (15522681).

Almost surely, 2^51742265 is an apocalyptic number.

It is an amenable number.

51742265 is a deficient number, since it is larger than the sum of its proper divisors (10348459).

51742265 is a wasteful number, since it uses less digits than its factorization.

51742265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10348458.

The product of its digits is 16800, while the sum is 32.

The square root of 51742265 is about 7193.2096452140. The cubic root of 51742265 is about 372.6334281704.

The spelling of 51742265 in words is "fifty-one million, seven hundred forty-two thousand, two hundred sixty-five".