51426545 has 4 divisors (see below), whose sum is σ = 61711860. Its totient is φ = 41141232.

The previous prime is 51426533. The next prime is 51426553. The reversal of 51426545 is 54562415.

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

It can be written as a sum of positive squares in 2 ways, for example, as 37356544 + 14070001 = 6112^2 + 3751^2 .

It is a cyclic number.

It is not a de Polignac number, because 51426545 - 2⁸ = 51426289 is a prime.

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, 5142650 + ... + 5142659.

It is an arithmetic number, because the mean of its divisors is an integer number (15427965).

Almost surely, 2^51426545 is an apocalyptic number.

It is an amenable number.

51426545 is a deficient number, since it is larger than the sum of its proper divisors (10285315).

51426545 is a wasteful number, since it uses less digits than its factorization.

51426545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10285314.

The product of its digits is 24000, while the sum is 32.

The square root of 51426545 is about 7171.2303686327. The cubic root of 51426545 is about 371.8739721272.

The spelling of 51426545 in words is "fifty-one million, four hundred twenty-six thousand, five hundred forty-five".