51455342 has 4 divisors (see below), whose sum is σ = 77183016. Its totient is φ = 25727670.

The previous prime is 51455321. The next prime is 51455377. The reversal of 51455342 is 24355415.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12863834 + ... + 12863837.

It is an arithmetic number, because the mean of its divisors is an integer number (19295754).

Almost surely, 2^51455342 is an apocalyptic number.

51455342 is a deficient number, since it is larger than the sum of its proper divisors (25727674).

51455342 is a wasteful number, since it uses less digits than its factorization.

51455342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25727673.

The product of its digits is 12000, while the sum is 29.

The square root of 51455342 is about 7173.2379020914. The cubic root of 51455342 is about 371.9433711541.

The spelling of 51455342 in words is "fifty-one million, four hundred fifty-five thousand, three hundred forty-two".