51494742 has 24 divisors (see below), whose sum is σ = 120154944. Its totient is φ = 15844464.

The previous prime is 51494741. The next prime is 51494743. The reversal of 51494742 is 24749415.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (51494741) and next prime (51494743).

It is a junction number, because it is equal to n+sod(n) for n = 51494697 and 51494706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51494741) 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, 109798 + ... + 110265.

It is an arithmetic number, because the mean of its divisors is an integer number (5006456).

Almost surely, 2^51494742 is an apocalyptic number.

51494742 is an abundant number, since it is smaller than the sum of its proper divisors (68660202).

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

51494742 is a wasteful number, since it uses less digits than its factorization.

51494742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220084 (or 220081 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 51494742 is about 7175.9836956337. The cubic root of 51494742 is about 372.0382808334.

The spelling of 51494742 in words is "fifty-one million, four hundred ninety-four thousand, seven hundred forty-two".