51201409 has 8 divisors (see below), whose sum is σ = 61595840. Its totient is φ = 41576976.

The previous prime is 51201407. The next prime is 51201419. The reversal of 51201409 is 90410215.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51201409 - 2¹ = 51201407 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51201409.

It is not an unprimeable number, because it can be changed into a prime (51201407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 192354 + ... + 192619.

It is an arithmetic number, because the mean of its divisors is an integer number (7699480).

Almost surely, 2^51201409 is an apocalyptic number.

It is an amenable number.

51201409 is a deficient number, since it is larger than the sum of its proper divisors (10394431).

51201409 is a wasteful number, since it uses less digits than its factorization.

51201409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384999.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 51201409 is about 7155.5159841901. The cubic root of 51201409 is about 371.3305129071.

The spelling of 51201409 in words is "fifty-one million, two hundred one thousand, four hundred nine".