51400458 has 12 divisors (see below), whose sum is σ = 111367698. Its totient is φ = 17133480.

The previous prime is 51400451. The next prime is 51400463. The reversal of 51400458 is 85400415.

It can be written as a sum of positive squares in only one way, i.e., 43599609 + 7800849 = 6603^2 + 2793^2 .

It is not an unprimeable number, because it can be changed into a prime (51400451) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1427773 + ... + 1427808.

Almost surely, 2^51400458 is an apocalyptic number.

51400458 is an abundant number, since it is smaller than the sum of its proper divisors (59967240).

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

51400458 is a wasteful number, since it uses less digits than its factorization.

51400458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2855589 (or 2855586 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The square root of 51400458 is about 7169.4112729010. The cubic root of 51400458 is about 371.8110816678.

The spelling of 51400458 in words is "fifty-one million, four hundred thousand, four hundred fifty-eight".