51532971 has 32 divisors (see below), whose sum is σ = 83466240. Its totient is φ = 27651456.

The previous prime is 51532969. The next prime is 51532979. The reversal of 51532971 is 17923515.

It is not a de Polignac number, because 51532971 - 2¹ = 51532969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51532979) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21390 + ... + 23676.

It is an arithmetic number, because the mean of its divisors is an integer number (2608320).

Almost surely, 2^51532971 is an apocalyptic number.

51532971 is a deficient number, since it is larger than the sum of its proper divisors (31933269).

51532971 is a wasteful number, since it uses less digits than its factorization.

51532971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2363.

The product of its digits is 9450, while the sum is 33.

The square root of 51532971 is about 7178.6468780683. The cubic root of 51532971 is about 372.1303234560.

The spelling of 51532971 in words is "fifty-one million, five hundred thirty-two thousand, nine hundred seventy-one".