51973506 has 24 divisors (see below), whose sum is σ = 121272060. Its totient is φ = 15991776.

The previous prime is 51973501. The next prime is 51973511. The reversal of 51973506 is 60537915.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (51973501) and next prime (51973511).

It can be written as a sum of positive squares in 2 ways, for example, as 51624225 + 349281 = 7185^2 + 591^2 .

It is not an unprimeable number, because it can be changed into a prime (51973501) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 110821 + ... + 111288.

Almost surely, 2^51973506 is an apocalyptic number.

51973506 is an abundant number, since it is smaller than the sum of its proper divisors (69298554).

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

51973506 is a wasteful number, since it uses less digits than its factorization.

51973506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222130 (or 222127 counting only the distinct ones).

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

The square root of 51973506 is about 7209.2652885020. The cubic root of 51973506 is about 373.1877144317.

The spelling of 51973506 in words is "fifty-one million, nine hundred seventy-three thousand, five hundred six".