51642454 has 16 divisors (see below), whose sum is σ = 79776288. Its totient is φ = 25054272.

The previous prime is 51642443. The next prime is 51642457. The reversal of 51642454 is 45424615.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51642457) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35322 + ... + 36754.

It is an arithmetic number, because the mean of its divisors is an integer number (4986018).

Almost surely, 2^51642454 is an apocalyptic number.

51642454 is a deficient number, since it is larger than the sum of its proper divisors (28133834).

51642454 is a wasteful number, since it uses less digits than its factorization.

51642454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1959.

The product of its digits is 19200, while the sum is 31.

The square root of 51642454 is about 7186.2684336170. The cubic root of 51642454 is about 372.3936702352.

The spelling of 51642454 in words is "fifty-one million, six hundred forty-two thousand, four hundred fifty-four".