51973157 has 2 divisors, whose sum is σ = 51973158. Its totient is φ = 51973156.

The previous prime is 51973121. The next prime is 51973171. The reversal of 51973157 is 75137915.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43217476 + 8755681 = 6574^2 + 2959^2 .

It is a cyclic number.

It is not a de Polignac number, because 51973157 - 2⁶ = 51973093 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51973157.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51973177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25986578 + 25986579.

It is an arithmetic number, because the mean of its divisors is an integer number (25986579).

Almost surely, 2^51973157 is an apocalyptic number.

It is an amenable number.

51973157 is a deficient number, since it is larger than the sum of its proper divisors (1).

51973157 is an equidigital number, since it uses as much as digits as its factorization.

51973157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 33075, while the sum is 38.

The square root of 51973157 is about 7209.2410834983. The cubic root of 51973157 is about 373.1868791164.

The spelling of 51973157 in words is "fifty-one million, nine hundred seventy-three thousand, one hundred fifty-seven".