51247388 has 6 divisors (see below), whose sum is σ = 89682936. Its totient is φ = 25623692.

The previous prime is 51247373. The next prime is 51247393. The reversal of 51247388 is 88374215.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6405920 + ... + 6405927.

It is an arithmetic number, because the mean of its divisors is an integer number (14947156).

Almost surely, 2^51247388 is an apocalyptic number.

It is an amenable number.

51247388 is a deficient number, since it is larger than the sum of its proper divisors (38435548).

51247388 is a wasteful number, since it uses less digits than its factorization.

51247388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12811851 (or 12811849 counting only the distinct ones).

The product of its digits is 53760, while the sum is 38.

The square root of 51247388 is about 7158.7280993204. The cubic root of 51247388 is about 371.4416315780.

The spelling of 51247388 in words is "fifty-one million, two hundred forty-seven thousand, three hundred eighty-eight".