51402265 has 8 divisors (see below), whose sum is σ = 62259840. Its totient is φ = 40737072.

The previous prime is 51402251. The next prime is 51402283. The reversal of 51402265 is 56220415.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51402265 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47505 + ... + 48574.

It is an arithmetic number, because the mean of its divisors is an integer number (7782480).

Almost surely, 2^51402265 is an apocalyptic number.

It is an amenable number.

51402265 is a deficient number, since it is larger than the sum of its proper divisors (10857575).

51402265 is a wasteful number, since it uses less digits than its factorization.

51402265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96191.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 51402265 is about 7169.5372932986. The cubic root of 51402265 is about 371.8154386637.

The spelling of 51402265 in words is "fifty-one million, four hundred two thousand, two hundred sixty-five".