51772471 has 4 divisors (see below), whose sum is σ = 54023472. Its totient is φ = 49521472.

The previous prime is 51772459. The next prime is 51772507. The reversal of 51772471 is 17427715.

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 51772471 - 2⁹ = 51771959 is a prime.

It is a super-3 number, since 3×51772471³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51772411) 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, 1125466 + ... + 1125511.

It is an arithmetic number, because the mean of its divisors is an integer number (13505868).

Almost surely, 2^51772471 is an apocalyptic number.

51772471 is a deficient number, since it is larger than the sum of its proper divisors (2251001).

51772471 is a wasteful number, since it uses less digits than its factorization.

51772471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2251000.

The product of its digits is 13720, while the sum is 34.

The square root of 51772471 is about 7195.3089579253. The cubic root of 51772471 is about 372.7059258068.

The spelling of 51772471 in words is "fifty-one million, seven hundred seventy-two thousand, four hundred seventy-one".