51420436 has 12 divisors (see below), whose sum is σ = 90181728. Its totient is φ = 25654232.

The previous prime is 51420419. The next prime is 51420443. The reversal of 51420436 is 63402415.

It is a super-2 number, since 2×51420436² = 5288122476860192, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51420436.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11896 + ... + 15631.

It is an arithmetic number, because the mean of its divisors is an integer number (7515144).

Almost surely, 2^51420436 is an apocalyptic number.

It is an amenable number.

51420436 is a deficient number, since it is larger than the sum of its proper divisors (38761292).

51420436 is a wasteful number, since it uses less digits than its factorization.

51420436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27998 (or 27996 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 51420436 is about 7170.8044179157. The cubic root of 51420436 is about 371.8592464762.

The spelling of 51420436 in words is "fifty-one million, four hundred twenty thousand, four hundred thirty-six".