51349239 has 24 divisors (see below), whose sum is σ = 76220352. Its totient is φ = 33296640.

The previous prime is 51349223. The next prime is 51349247. The reversal of 51349239 is 93294315.

It is a happy number.

It is not a de Polignac number, because 51349239 - 2⁴ = 51349223 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51349219) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 98299 + ... + 98819.

It is an arithmetic number, because the mean of its divisors is an integer number (3175848).

Almost surely, 2^51349239 is an apocalyptic number.

51349239 is a deficient number, since it is larger than the sum of its proper divisors (24871113).

51349239 is a wasteful number, since it uses less digits than its factorization.

51349239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 807 (or 804 counting only the distinct ones).

The product of its digits is 29160, while the sum is 36.

The square root of 51349239 is about 7165.8383319748. The cubic root of 51349239 is about 371.6875411291.

The spelling of 51349239 in words is "fifty-one million, three hundred forty-nine thousand, two hundred thirty-nine".