56551994 has 4 divisors (see below), whose sum is σ = 84827994. Its totient is φ = 28275996.

The previous prime is 56551991. The next prime is 56552003. The reversal of 56551994 is 49915565.

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

It can be written as a sum of positive squares in only one way, i.e., 55696369 + 855625 = 7463^2 + 925^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (56551991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14137997 + ... + 14138000.

Almost surely, 2^56551994 is an apocalyptic number.

56551994 is a deficient number, since it is larger than the sum of its proper divisors (28276000).

56551994 is a wasteful number, since it uses less digits than its factorization.

56551994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28275999.

The product of its digits is 243000, while the sum is 44.

The square root of 56551994 is about 7520.1059832957. The cubic root of 56551994 is about 383.8391841440.

The spelling of 56551994 in words is "fifty-six million, five hundred fifty-one thousand, nine hundred ninety-four".