51193402 has 8 divisors (see below), whose sum is σ = 82697076. Its totient is φ = 23627712.

The previous prime is 51193397. The next prime is 51193403. The reversal of 51193402 is 20439115.

It can be written as a sum of positive squares in 2 ways, for example, as 41589601 + 9603801 = 6449^2 + 3099^2 .

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

It is not an unprimeable number, because it can be changed into a prime (51193403) 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, 984463 + ... + 984514.

Almost surely, 2^51193402 is an apocalyptic number.

51193402 is a deficient number, since it is larger than the sum of its proper divisors (31503674).

51193402 is a wasteful number, since it uses less digits than its factorization.

51193402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1968992.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 51193402 is about 7154.9564638787. The cubic root of 51193402 is about 371.3111553772.

The spelling of 51193402 in words is "fifty-one million, one hundred ninety-three thousand, four hundred two".