220757947 has 16 divisors (see below), whose sum is σ = 235815840. Its totient is φ = 206260992.

The previous prime is 220757939. The next prime is 220757951. The reversal of 220757947 is 749757022.

It is not a de Polignac number, because 220757947 - 2³ = 220757939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220757987) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 249568 + ... + 250450.

It is an arithmetic number, because the mean of its divisors is an integer number (14738490).

Almost surely, 2^220757947 is an apocalyptic number.

220757947 is a deficient number, since it is larger than the sum of its proper divisors (15057893).

220757947 is a wasteful number, since it uses less digits than its factorization.

220757947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1182.

The product of its (nonzero) digits is 246960, while the sum is 43.

The square root of 220757947 is about 14857.9253935400. The cubic root of 220757947 is about 604.3735491346.

It can be divided in two parts, 22075 and 7947, that multiplied together give a square (175430025 = 13245²).

The spelling of 220757947 in words is "two hundred twenty million, seven hundred fifty-seven thousand, nine hundred forty-seven".