51356407 has 4 divisors (see below), whose sum is σ = 52744456. Its totient is φ = 49968360.

The previous prime is 51356381. The next prime is 51356443. The reversal of 51356407 is 70465315.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51356407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51356497) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 693969 + ... + 694042.

It is an arithmetic number, because the mean of its divisors is an integer number (13186114).

Almost surely, 2^51356407 is an apocalyptic number.

51356407 is a deficient number, since it is larger than the sum of its proper divisors (1388049).

51356407 is a wasteful number, since it uses less digits than its factorization.

51356407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1388048.

The product of its (nonzero) digits is 12600, while the sum is 31.

The square root of 51356407 is about 7166.3384653531. The cubic root of 51356407 is about 371.7048353311.

The spelling of 51356407 in words is "fifty-one million, three hundred fifty-six thousand, four hundred seven".