51011571 has 16 divisors (see below), whose sum is σ = 73606400. Its totient is φ = 31237920.

The previous prime is 51011557. The next prime is 51011573. The reversal of 51011571 is 17511015.

It is a happy number.

It is not a de Polignac number, because 51011571 - 2²¹ = 48914419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51011573) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5130 + ... + 11328.

It is an arithmetic number, because the mean of its divisors is an integer number (4600400).

Almost surely, 2^51011571 is an apocalyptic number.

51011571 is a deficient number, since it is larger than the sum of its proper divisors (22594829).

51011571 is a wasteful number, since it uses less digits than its factorization.

51011571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6426.

The product of its (nonzero) digits is 175, while the sum is 21.

The square root of 51011571 is about 7142.2385146395. The cubic root of 51011571 is about 370.8710207149.

Adding to 51011571 its reverse (17511015), we get a palindrome (68522586).

The spelling of 51011571 in words is "fifty-one million, eleven thousand, five hundred seventy-one".