51756426 has 24 divisors (see below), whose sum is σ = 113979684. Its totient is φ = 16968960.

The previous prime is 51756421. The next prime is 51756427. The reversal of 51756426 is 62465715.

It is a happy number.

51756426 is a `hidden beast` number, since 5 + 1 + 7 + 5 + 642 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 31371201 + 20385225 = 5601^2 + 4515^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51756421) 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, 22471 + ... + 24666.

Almost surely, 2^51756426 is an apocalyptic number.

51756426 is an abundant number, since it is smaller than the sum of its proper divisors (62223258).

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

51756426 is a wasteful number, since it uses less digits than its factorization.

51756426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47206 (or 47203 counting only the distinct ones).

The product of its digits is 50400, while the sum is 36.

The square root of 51756426 is about 7194.1939089797. The cubic root of 51756426 is about 372.6674195998.

The spelling of 51756426 in words is "fifty-one million, seven hundred fifty-six thousand, four hundred twenty-six".