51542531 has 2 divisors, whose sum is σ = 51542532. Its totient is φ = 51542530.

The previous prime is 51542479. The next prime is 51542567. The reversal of 51542531 is 13524515.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51542531 - 2¹⁸ = 51280387 is a prime.

It is a super-2 number, since 2×51542531² = 5313265003771922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is equal to p_3088016 and since 51542531 and 3088016 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51542531.

It is not a weakly prime, because it can be changed into another prime (51542131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25771265 + 25771266.

It is an arithmetic number, because the mean of its divisors is an integer number (25771266).

Almost surely, 2^51542531 is an apocalyptic number.

51542531 is a deficient number, since it is larger than the sum of its proper divisors (1).

51542531 is an equidigital number, since it uses as much as digits as its factorization.

51542531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3000, while the sum is 26.

The square root of 51542531 is about 7179.3127108380. The cubic root of 51542531 is about 372.1533336173.

The spelling of 51542531 in words is "fifty-one million, five hundred forty-two thousand, five hundred thirty-one".