51742051 has 4 divisors (see below), whose sum is σ = 52041312. Its totient is φ = 51442792.

The previous prime is 51742049. The next prime is 51742063. The reversal of 51742051 is 15024715.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15024715 = 5 ⋅3004943.

It is a cyclic number.

It is not a de Polignac number, because 51742051 - 2¹ = 51742049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51742001) 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, 149371 + ... + 149716.

It is an arithmetic number, because the mean of its divisors is an integer number (13010328).

Almost surely, 2^51742051 is an apocalyptic number.

51742051 is a deficient number, since it is larger than the sum of its proper divisors (299261).

51742051 is a wasteful number, since it uses less digits than its factorization.

51742051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299260.

The product of its (nonzero) digits is 1400, while the sum is 25.

The square root of 51742051 is about 7193.1947700587. The cubic root of 51742051 is about 372.6329144468.

Adding to 51742051 its reverse (15024715), we get a palindrome (66766766).

It can be divided in two parts, 5174 and 2051, that added together give a square (7225 = 85²).

The spelling of 51742051 in words is "fifty-one million, seven hundred forty-two thousand, fifty-one".