51545437 has 2 divisors, whose sum is σ = 51545438. Its totient is φ = 51545436.

The previous prime is 51545419. The next prime is 51545443. The reversal of 51545437 is 73454515.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51538041 + 7396 = 7179^2 + 86^2 .

It is a cyclic number.

It is not a de Polignac number, because 51545437 - 2¹⁹ = 51021149 is a prime.

It is equal to p_3088195 and since 51545437 and 3088195 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51545497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25772718 + 25772719.

It is an arithmetic number, because the mean of its divisors is an integer number (25772719).

Almost surely, 2^51545437 is an apocalyptic number.

It is an amenable number.

51545437 is a deficient number, since it is larger than the sum of its proper divisors (1).

51545437 is an equidigital number, since it uses as much as digits as its factorization.

51545437 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42000, while the sum is 34.

The square root of 51545437 is about 7179.5150950465. The cubic root of 51545437 is about 372.1603275648.

The spelling of 51545437 in words is "fifty-one million, five hundred forty-five thousand, four hundred thirty-seven".