57220205 has 16 divisors (see below), whose sum is σ = 81886464. Its totient is φ = 37530240.

The previous prime is 57220201. The next prime is 57220213. The reversal of 57220205 is 50202275.

It is not a de Polignac number, because 57220205 - 2² = 57220201 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57220201) 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, 34736 + ... + 36345.

It is an arithmetic number, because the mean of its divisors is an integer number (5117904).

Almost surely, 2^57220205 is an apocalyptic number.

It is an amenable number.

57220205 is a deficient number, since it is larger than the sum of its proper divisors (24666259).

57220205 is a wasteful number, since it uses less digits than its factorization.

57220205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71116.

The product of its (nonzero) digits is 1400, while the sum is 23.

The square root of 57220205 is about 7564.4038099509. The cubic root of 57220205 is about 385.3450664689.

The spelling of 57220205 in words is "fifty-seven million, two hundred twenty thousand, two hundred five".