51542313 has 4 divisors (see below), whose sum is σ = 68723088. Its totient is φ = 34361540.

The previous prime is 51542311. The next prime is 51542321. The reversal of 51542313 is 31324515.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51542313 - 2¹ = 51542311 is a prime.

It is a super-2 number, since 2×51542313² = 5313220058779938, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51542311) 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, 8590383 + ... + 8590388.

It is an arithmetic number, because the mean of its divisors is an integer number (17180772).

Almost surely, 2^51542313 is an apocalyptic number.

It is an amenable number.

51542313 is a deficient number, since it is larger than the sum of its proper divisors (17180775).

51542313 is a wasteful number, since it uses less digits than its factorization.

51542313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17180774.

The product of its digits is 1800, while the sum is 24.

The square root of 51542313 is about 7179.2975283101. The cubic root of 51542313 is about 372.1528089403.

Adding to 51542313 its reverse (31324515), we get a palindrome (82866828).

The spelling of 51542313 in words is "fifty-one million, five hundred forty-two thousand, three hundred thirteen".