51959257 has 6 divisors (see below), whose sum is σ = 60442458. Its totient is φ = 44536464.

The previous prime is 51959221. The next prime is 51959269. The reversal of 51959257 is 75295915.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 32387481 + 19571776 = 5691^2 + 4424^2 .

It is a de Polignac number, because none of the positive numbers 2^k-51959257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51959207) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 530148 + ... + 530245.

It is an arithmetic number, because the mean of its divisors is an integer number (10073743).

Almost surely, 2^51959257 is an apocalyptic number.

It is an amenable number.

51959257 is a deficient number, since it is larger than the sum of its proper divisors (8483201).

51959257 is a wasteful number, since it uses less digits than its factorization.

51959257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1060407 (or 1060400 counting only the distinct ones).

The product of its digits is 141750, while the sum is 43.

The square root of 51959257 is about 7208.2769785851. The cubic root of 51959257 is about 373.1536070683.

The spelling of 51959257 in words is "fifty-one million, nine hundred fifty-nine thousand, two hundred fifty-seven".