51540498 has 24 divisors (see below), whose sum is σ = 118240668. Its totient is φ = 16169472.

The previous prime is 51540497. The next prime is 51540499. The reversal of 51540498 is 89404515.

It is an interprime number because it is at equal distance from previous prime (51540497) and next prime (51540499).

It can be written as a sum of positive squares in 2 ways, for example, as 50936769 + 603729 = 7137^2 + 777^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51540497) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 83911 + ... + 84522.

Almost surely, 2^51540498 is an apocalyptic number.

51540498 is an abundant number, since it is smaller than the sum of its proper divisors (66700170).

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

51540498 is a wasteful number, since it uses less digits than its factorization.

51540498 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168458 (or 168455 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 51540498 is about 7179.1711220725. The cubic root of 51540498 is about 372.1484405859.

The spelling of 51540498 in words is "fifty-one million, five hundred forty thousand, four hundred ninety-eight".