51740139 has 16 divisors (see below), whose sum is σ = 76495104. Its totient is φ = 30842400.

The previous prime is 51740131. The next prime is 51740141. The reversal of 51740139 is 93104715.

It is not a de Polignac number, because 51740139 - 2³ = 51740131 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51740131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10839 + ... + 14864.

It is an arithmetic number, because the mean of its divisors is an integer number (4780944).

Almost surely, 2^51740139 is an apocalyptic number.

51740139 is a deficient number, since it is larger than the sum of its proper divisors (24754965).

51740139 is a wasteful number, since it uses less digits than its factorization.

51740139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25778.

The product of its (nonzero) digits is 3780, while the sum is 30.

The square root of 51740139 is about 7193.0618654367. The cubic root of 51740139 is about 372.6283244799.

The spelling of 51740139 in words is "fifty-one million, seven hundred forty thousand, one hundred thirty-nine".