51442365 has 32 divisors (see below), whose sum is σ = 89018496. Its totient is φ = 25217280.

The previous prime is 51442343. The next prime is 51442381. The reversal of 51442365 is 56324415.

It is not a de Polignac number, because 51442365 - 2⁵ = 51442333 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 64147 + ... + 64943.

It is an arithmetic number, because the mean of its divisors is an integer number (2781828).

Almost surely, 2^51442365 is an apocalyptic number.

It is an amenable number.

51442365 is a deficient number, since it is larger than the sum of its proper divisors (37576131).

51442365 is a wasteful number, since it uses less digits than its factorization.

51442365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1149.

The product of its digits is 14400, while the sum is 30.

The square root of 51442365 is about 7172.3333023501. Note that the first 4 decimals coincide. The cubic root of 51442365 is about 371.9121005755.

The spelling of 51442365 in words is "fifty-one million, four hundred forty-two thousand, three hundred sixty-five".