51730965 has 48 divisors (see below), whose sum is σ = 105356160. Its totient is φ = 23149440.

The previous prime is 51730963. The next prime is 51730981. The reversal of 51730965 is 56903715.

It is a happy number.

It is not a de Polignac number, because 51730965 - 2¹ = 51730963 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51730963) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2416 + ... + 10454.

It is an arithmetic number, because the mean of its divisors is an integer number (2194920).

Almost surely, 2^51730965 is an apocalyptic number.

51730965 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

51730965 is an abundant number, since it is smaller than the sum of its proper divisors (53625195).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51730965 is a wasteful number, since it uses less digits than its factorization.

51730965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8074 (or 8071 counting only the distinct ones).

The product of its (nonzero) digits is 28350, while the sum is 36.

The square root of 51730965 is about 7192.4241393288. The cubic root of 51730965 is about 372.6062997077.

The spelling of 51730965 in words is "fifty-one million, seven hundred thirty thousand, nine hundred sixty-five".