140235551 has 2 divisors, whose sum is σ = 140235552. Its totient is φ = 140235550.

The previous prime is 140235547. The next prime is 140235593. The reversal of 140235551 is 155532041.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 140235551 - 2² = 140235547 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 140235551.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140232551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70117775 + 70117776.

It is an arithmetic number, because the mean of its divisors is an integer number (70117776).

Almost surely, 2^140235551 is an apocalyptic number.

140235551 is a deficient number, since it is larger than the sum of its proper divisors (1).

140235551 is an equidigital number, since it uses as much as digits as its factorization.

140235551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 140235551 is about 11842.1092293561. The cubic root of 140235551 is about 519.5404606285.

Adding to 140235551 its reverse (155532041), we get a palindrome (295767592).

The spelling of 140235551 in words is "one hundred forty million, two hundred thirty-five thousand, five hundred fifty-one".