222181557 has 32 divisors (see below), whose sum is σ = 340730880. Its totient is φ = 127733760.

The previous prime is 222181543. The next prime is 222181591. The reversal of 222181557 is 755181222.

It is not a de Polignac number, because 222181557 - 2⁷ = 222181429 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222181537) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31893 + ... + 38229.

It is an arithmetic number, because the mean of its divisors is an integer number (10647840).

Almost surely, 2^222181557 is an apocalyptic number.

It is an amenable number.

222181557 is a deficient number, since it is larger than the sum of its proper divisors (118549323).

222181557 is a wasteful number, since it uses less digits than its factorization.

222181557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6413.

The product of its digits is 11200, while the sum is 33.

The square root of 222181557 is about 14905.7558345761. The cubic root of 222181557 is about 605.6699152171.

The spelling of 222181557 in words is "two hundred twenty-two million, one hundred eighty-one thousand, five hundred fifty-seven".