51437961 has 6 divisors (see below), whose sum is σ = 74299290. Its totient is φ = 34291968.

The previous prime is 51437957. The next prime is 51437963. The reversal of 51437961 is 16973415.

It can be written as a sum of positive squares in only one way, i.e., 48441600 + 2996361 = 6960^2 + 1731^2 .

It is not a de Polignac number, because 51437961 - 2² = 51437957 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51437963) 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, 2857656 + ... + 2857673.

It is an arithmetic number, because the mean of its divisors is an integer number (12383215).

Almost surely, 2^51437961 is an apocalyptic number.

It is an amenable number.

51437961 is a deficient number, since it is larger than the sum of its proper divisors (22861329).

51437961 is a wasteful number, since it uses less digits than its factorization.

51437961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5715335 (or 5715332 counting only the distinct ones).

The product of its digits is 22680, while the sum is 36.

The square root of 51437961 is about 7172.0262827182. The cubic root of 51437961 is about 371.9014870949.

The spelling of 51437961 in words is "fifty-one million, four hundred thirty-seven thousand, nine hundred sixty-one".