51145479 has 64 divisors (see below), whose sum is σ = 96046080. Its totient is φ = 26127360.

The previous prime is 51145463. The next prime is 51145499. The reversal of 51145479 is 97454115.

It is not a de Polignac number, because 51145479 - 2⁴ = 51145463 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51145429) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 151599 + ... + 151935.

It is an arithmetic number, because the mean of its divisors is an integer number (1500720).

Almost surely, 2^51145479 is an apocalyptic number.

51145479 is a deficient number, since it is larger than the sum of its proper divisors (44900601).

51145479 is a wasteful number, since it uses less digits than its factorization.

51145479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437 (or 431 counting only the distinct ones).

The product of its digits is 25200, while the sum is 36.

The square root of 51145479 is about 7151.6067425439. The cubic root of 51145479 is about 371.1952556764.

It can be divided in two parts, 51 and 145479, that added together give a triangular number (145530 = T₅₃₉).

The spelling of 51145479 in words is "fifty-one million, one hundred forty-five thousand, four hundred seventy-nine".