51540426 has 48 divisors (see below), whose sum is σ = 134347200. Its totient is φ = 13950144.

The previous prime is 51540421. The next prime is 51540439. The reversal of 51540426 is 62404515.

It is a super-2 number, since 2×51540426² = 5312831024522952, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51540426.

It is not an unprimeable number, because it can be changed into a prime (51540421) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8371 + ... + 13158.

It is an arithmetic number, because the mean of its divisors is an integer number (2798900).

Almost surely, 2^51540426 is an apocalyptic number.

51540426 is an abundant number, since it is smaller than the sum of its proper divisors (82806774).

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

51540426 is a wasteful number, since it uses less digits than its factorization.

51540426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21563 (or 21560 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 51540426 is about 7179.1661075643. The cubic root of 51540426 is about 372.1482672937.

The spelling of 51540426 in words is "fifty-one million, five hundred forty thousand, four hundred twenty-six".