51009494 has 8 divisors (see below), whose sum is σ = 78380568. Its totient is φ = 24882640.

The previous prime is 51009449. The next prime is 51009529. The reversal of 51009494 is 49490015.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 51009494.

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, 310952 + ... + 311115.

It is an arithmetic number, because the mean of its divisors is an integer number (9797571).

Almost surely, 2^51009494 is an apocalyptic number.

51009494 is a deficient number, since it is larger than the sum of its proper divisors (27371074).

51009494 is a wasteful number, since it uses less digits than its factorization.

51009494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 622110.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 51009494 is about 7142.0931105664. The cubic root of 51009494 is about 370.8659871539.

The spelling of 51009494 in words is "fifty-one million, nine thousand, four hundred ninety-four".