51349420 has 12 divisors (see below), whose sum is σ = 107833824. Its totient is φ = 20539760.

The previous prime is 51349399. The next prime is 51349433. The reversal of 51349420 is 2494315.

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, 1283716 + ... + 1283755.

It is an arithmetic number, because the mean of its divisors is an integer number (8986152).

Almost surely, 2^51349420 is an apocalyptic number.

It is an amenable number.

51349420 is an abundant number, since it is smaller than the sum of its proper divisors (56484404).

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

51349420 is a wasteful number, since it uses less digits than its factorization.

51349420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2567480 (or 2567478 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 51349420 is about 7165.8509613304. The cubic root of 51349420 is about 371.6879778468.

The spelling of 51349420 in words is "fifty-one million, three hundred forty-nine thousand, four hundred twenty".