51205402 has 8 divisors (see below), whose sum is σ = 77030496. Its totient is φ = 25528572.

The previous prime is 51205379. The next prime is 51205417. The reversal of 51205402 is 20450215.

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 51205402.

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, 36198 + ... + 37585.

It is an arithmetic number, because the mean of its divisors is an integer number (9628812).

Almost surely, 2^51205402 is an apocalyptic number.

51205402 is a deficient number, since it is larger than the sum of its proper divisors (25825094).

51205402 is a wasteful number, since it uses less digits than its factorization.

51205402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74132.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 51205402 is about 7155.7949942686. The cubic root of 51205402 is about 371.3401655333.

Adding to 51205402 its reverse (20450215), we get a palindrome (71655617).

The spelling of 51205402 in words is "fifty-one million, two hundred five thousand, four hundred two".