51421436 has 24 divisors (see below), whose sum is σ = 101337600. Its totient is φ = 22618800.

The previous prime is 51421427. The next prime is 51421439. The reversal of 51421436 is 63412415.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51421439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17486 + ... + 20213.

It is an arithmetic number, because the mean of its divisors is an integer number (4222400).

Almost surely, 2^51421436 is an apocalyptic number.

It is an amenable number.

51421436 is a deficient number, since it is larger than the sum of its proper divisors (49916164).

51421436 is a wasteful number, since it uses less digits than its factorization.

51421436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37745 (or 37743 counting only the distinct ones).

The product of its digits is 2880, while the sum is 26.

The square root of 51421436 is about 7170.8741447609. The cubic root of 51421436 is about 371.8616570407.

The spelling of 51421436 in words is "fifty-one million, four hundred twenty-one thousand, four hundred thirty-six".