51470387 has 4 divisors (see below), whose sum is σ = 51731856. Its totient is φ = 51208920.

The previous prime is 51470383. The next prime is 51470401. The reversal of 51470387 is 78307415.

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

It is a cyclic number.

It is not a de Polignac number, because 51470387 - 2² = 51470383 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51470383) 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, 130439 + ... + 130832.

It is an arithmetic number, because the mean of its divisors is an integer number (12932964).

Almost surely, 2^51470387 is an apocalyptic number.

51470387 is a deficient number, since it is larger than the sum of its proper divisors (261469).

51470387 is a wasteful number, since it uses less digits than its factorization.

51470387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261468.

The product of its (nonzero) digits is 23520, while the sum is 35.

The square root of 51470387 is about 7174.2865150480. The cubic root of 51470387 is about 371.9796183962.

The spelling of 51470387 in words is "fifty-one million, four hundred seventy thousand, three hundred eighty-seven".