51378053 has 4 divisors (see below), whose sum is σ = 53149740. Its totient is φ = 49606368.

The previous prime is 51378023. The next prime is 51378101. The reversal of 51378053 is 35087315.

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 33721249 + 17656804 = 5807^2 + 4202^2 .

It is a cyclic number.

It is not a de Polignac number, because 51378053 - 2²² = 47183749 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 (51378023) 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, 885800 + ... + 885857.

It is an arithmetic number, because the mean of its divisors is an integer number (13287435).

Almost surely, 2^51378053 is an apocalyptic number.

It is an amenable number.

51378053 is a deficient number, since it is larger than the sum of its proper divisors (1771687).

51378053 is a wasteful number, since it uses less digits than its factorization.

51378053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1771686.

The product of its (nonzero) digits is 12600, while the sum is 32.

The square root of 51378053 is about 7167.8485614583. The cubic root of 51378053 is about 371.7570507746.

The spelling of 51378053 in words is "fifty-one million, three hundred seventy-eight thousand, fifty-three".