51957261 has 8 divisors (see below), whose sum is σ = 76973760. Its totient is φ = 34638156.

The previous prime is 51957233. The next prime is 51957277. The reversal of 51957261 is 16275915.

It is not a de Polignac number, because 51957261 - 2⁶ = 51957197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51957281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 962145 + ... + 962198.

It is an arithmetic number, because the mean of its divisors is an integer number (9621720).

Almost surely, 2^51957261 is an apocalyptic number.

It is an amenable number.

51957261 is a deficient number, since it is larger than the sum of its proper divisors (25016499).

51957261 is a wasteful number, since it uses less digits than its factorization.

51957261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1924352 (or 1924346 counting only the distinct ones).

The product of its digits is 18900, while the sum is 36.

The square root of 51957261 is about 7208.1385253060. The cubic root of 51957261 is about 373.1488288108.

The spelling of 51957261 in words is "fifty-one million, nine hundred fifty-seven thousand, two hundred sixty-one".