51451402 has 8 divisors (see below), whose sum is σ = 77608800. Its totient is φ = 25581804.

The previous prime is 51451369. The next prime is 51451409. The reversal of 51451402 is 20415415.

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 (51451409) 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, 71502 + ... + 72217.

It is an arithmetic number, because the mean of its divisors is an integer number (9701100).

Almost surely, 2^51451402 is an apocalyptic number.

51451402 is a deficient number, since it is larger than the sum of its proper divisors (26157398).

51451402 is a wasteful number, since it uses less digits than its factorization.

51451402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143900.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 51451402 is about 7172.9632649275. The cubic root of 51451402 is about 371.9338775218.

Adding to 51451402 its reverse (20415415), we get a palindrome (71866817).

The spelling of 51451402 in words is "fifty-one million, four hundred fifty-one thousand, four hundred two".