51662943 has 6 divisors (see below), whose sum is σ = 74624264. Its totient is φ = 34441956.

The previous prime is 51662921. The next prime is 51662951. The reversal of 51662943 is 34926615.

It is a happy number.

It is not a de Polignac number, because 51662943 - 2¹³ = 51654751 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51662898 and 51662907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51662243) 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, 2870155 + ... + 2870172.

Almost surely, 2^51662943 is an apocalyptic number.

51662943 is a deficient number, since it is larger than the sum of its proper divisors (22961321).

51662943 is a wasteful number, since it uses less digits than its factorization.

51662943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5740333 (or 5740330 counting only the distinct ones).

The product of its digits is 38880, while the sum is 36.

The square root of 51662943 is about 7187.6938582552. The cubic root of 51662943 is about 372.4429124412.

The spelling of 51662943 in words is "fifty-one million, six hundred sixty-two thousand, nine hundred forty-three".