51167540 has 12 divisors (see below), whose sum is σ = 107451876. Its totient is φ = 20467008.

The previous prime is 51167533. The next prime is 51167657. The reversal of 51167540 is 4576115.

It can be written as a sum of positive squares in 2 ways, for example, as 9461776 + 41705764 = 3076^2 + 6458^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1279169 + ... + 1279208.

It is an arithmetic number, because the mean of its divisors is an integer number (8954323).

Almost surely, 2^51167540 is an apocalyptic number.

It is an amenable number.

51167540 is an abundant number, since it is smaller than the sum of its proper divisors (56284336).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51167540 is a wasteful number, since it uses less digits than its factorization.

51167540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2558386 (or 2558384 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 29.

The square root of 51167540 is about 7153.1489569280. The cubic root of 51167540 is about 371.2486182386.

The spelling of 51167540 in words is "fifty-one million, one hundred sixty-seven thousand, five hundred forty".