51199511 has 8 divisors (see below), whose sum is σ = 56054784. Its totient is φ = 46377720.

The previous prime is 51199501. The next prime is 51199513. The reversal of 51199511 is 11599115.

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

It is a cyclic number.

It is not a de Polignac number, because 51199511 - 2¹⁰ = 51198487 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 (51199513) 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, 5111 + ... + 11336.

It is an arithmetic number, because the mean of its divisors is an integer number (7006848).

Almost surely, 2^51199511 is an apocalyptic number.

51199511 is a deficient number, since it is larger than the sum of its proper divisors (4855273).

51199511 is a wasteful number, since it uses less digits than its factorization.

51199511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16741.

The product of its digits is 2025, while the sum is 32.

The square root of 51199511 is about 7155.3833580040. The cubic root of 51199511 is about 371.3259245306.

The spelling of 51199511 in words is "fifty-one million, one hundred ninety-nine thousand, five hundred eleven".