55551970 has 8 divisors (see below), whose sum is σ = 99993564. Its totient is φ = 22220784.

The previous prime is 55551961. The next prime is 55551973. The reversal of 55551970 is 7915555.

It can be written as a sum of positive squares in 2 ways, for example, as 55547209 + 4761 = 7453^2 + 69^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (55551973) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2777589 + ... + 2777608.

Almost surely, 2^55551970 is an apocalyptic number.

55551970 is a deficient number, since it is larger than the sum of its proper divisors (44441594).

55551970 is a wasteful number, since it uses less digits than its factorization.

55551970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5555204.

The product of its (nonzero) digits is 39375, while the sum is 37.

The square root of 55551970 is about 7453.3193947395. The cubic root of 55551970 is about 381.5632051348.

It can be divided in two parts, 555 and 51970, that added together give a palindrome (52525).

The spelling of 55551970 in words is "fifty-five million, five hundred fifty-one thousand, nine hundred seventy".