111640541 has 2 divisors, whose sum is σ = 111640542. Its totient is φ = 111640540.

The previous prime is 111640537. The next prime is 111640577. The reversal of 111640541 is 145046111.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111619225 + 21316 = 10565^2 + 146^2 .

It is a cyclic number.

It is not a de Polignac number, because 111640541 - 2² = 111640537 is a prime.

It is a super-2 number, since 2×111640541² = 24927220789545362, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111640591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55820270 + 55820271.

It is an arithmetic number, because the mean of its divisors is an integer number (55820271).

Almost surely, 2^111640541 is an apocalyptic number.

It is an amenable number.

111640541 is a deficient number, since it is larger than the sum of its proper divisors (1).

111640541 is an equidigital number, since it uses as much as digits as its factorization.

111640541 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 111640541 is about 10566.0087544919. The cubic root of 111640541 is about 481.5122172287.

Adding to 111640541 its reverse (145046111), we get a palindrome (256686652).

The spelling of 111640541 in words is "one hundred eleven million, six hundred forty thousand, five hundred forty-one".