51365405 has 32 divisors (see below), whose sum is σ = 76876800. Its totient is φ = 32078592.

The previous prime is 51365401. The next prime is 51365411. The reversal of 51365405 is 50456315.

It is not a de Polignac number, because 51365405 - 2² = 51365401 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51365401) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35231 + ... + 36659.

It is an arithmetic number, because the mean of its divisors is an integer number (2402400).

Almost surely, 2^51365405 is an apocalyptic number.

It is an amenable number.

51365405 is a deficient number, since it is larger than the sum of its proper divisors (25511395).

51365405 is a wasteful number, since it uses less digits than its factorization.

51365405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1533.

The product of its (nonzero) digits is 9000, while the sum is 29.

The square root of 51365405 is about 7166.9662340491. The cubic root of 51365405 is about 371.7265424882.

The spelling of 51365405 in words is "fifty-one million, three hundred sixty-five thousand, four hundred five".