51447090 has 32 divisors (see below), whose sum is σ = 128843136. Its totient is φ = 13122560.

The previous prime is 51447061. The next prime is 51447101. The reversal of 51447090 is 9074415.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36591 + ... + 37970.

It is an arithmetic number, because the mean of its divisors is an integer number (4026348).

Almost surely, 2^51447090 is an apocalyptic number.

51447090 is an abundant number, since it is smaller than the sum of its proper divisors (77396046).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51447090 is a wasteful number, since it uses less digits than its factorization.

51447090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74594.

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 51447090 is about 7172.6626855025. The cubic root of 51447090 is about 371.9234869809.

The spelling of 51447090 in words is "fifty-one million, four hundred forty-seven thousand, ninety".