51222455 has 8 divisors (see below), whose sum is σ = 61515504. Its totient is φ = 40945600.

The previous prime is 51222427. The next prime is 51222463. The reversal of 51222455 is 55422215.

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

It is not a de Polignac number, because 51222455 - 2¹² = 51218359 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 4595 + ... + 11115.

It is an arithmetic number, because the mean of its divisors is an integer number (7689438).

Almost surely, 2^51222455 is an apocalyptic number.

51222455 is a deficient number, since it is larger than the sum of its proper divisors (10293049).

51222455 is a wasteful number, since it uses less digits than its factorization.

51222455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8097.

The product of its digits is 4000, while the sum is 26.

The square root of 51222455 is about 7156.9864468224. The cubic root of 51222455 is about 371.3813835869.

The spelling of 51222455 in words is "fifty-one million, two hundred twenty-two thousand, four hundred fifty-five".