51493802 has 8 divisors (see below), whose sum is σ = 77733156. Its totient is φ = 25582752.

The previous prime is 51493789. The next prime is 51493807. The reversal of 51493802 is 20839415.

It can be written as a sum of positive squares in 2 ways, for example, as 44209201 + 7284601 = 6649^2 + 2699^2 .

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

It is a super-2 number, since 2×51493802² = 5303223288830408, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51493807) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81683 + ... + 82310.

Almost surely, 2^51493802 is an apocalyptic number.

51493802 is a deficient number, since it is larger than the sum of its proper divisors (26239354).

51493802 is a wasteful number, since it uses less digits than its factorization.

51493802 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164152.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 51493802 is about 7175.9181990878. The cubic root of 51493802 is about 372.0360170546.

The spelling of 51493802 in words is "fifty-one million, four hundred ninety-three thousand, eight hundred two".