140211557 has 2 divisors, whose sum is σ = 140211558. Its totient is φ = 140211556.

The previous prime is 140211541. The next prime is 140211559. The reversal of 140211557 is 755112041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 139381636 + 829921 = 11806^2 + 911^2 .

It is a cyclic number.

It is not a de Polignac number, because 140211557 - 2⁴ = 140211541 is a prime.

Together with 140211559, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140211559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70105778 + 70105779.

It is an arithmetic number, because the mean of its divisors is an integer number (70105779).

Almost surely, 2^140211557 is an apocalyptic number.

It is an amenable number.

140211557 is a deficient number, since it is larger than the sum of its proper divisors (1).

140211557 is an equidigital number, since it uses as much as digits as its factorization.

140211557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1400, while the sum is 26.

The square root of 140211557 is about 11841.0961063577. The cubic root of 140211557 is about 519.5108281880.

Adding to 140211557 its reverse (755112041), we get a palindrome (895323598).

The spelling of 140211557 in words is "one hundred forty million, two hundred eleven thousand, five hundred fifty-seven".