140525531 has 2 divisors, whose sum is σ = 140525532. Its totient is φ = 140525530.

The previous prime is 140525527. The next prime is 140525533. The reversal of 140525531 is 135525041.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 140525531 - 2² = 140525527 is a prime.

It is a super-2 number, since 2×140525531² = 39494849725663922, which contains 22 as substring.

Together with 140525533, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_7940141 and since 140525531 and 7940141 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 140525531.

It is not a weakly prime, because it can be changed into another prime (140525533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70262765 + 70262766.

It is an arithmetic number, because the mean of its divisors is an integer number (70262766).

Almost surely, 2^140525531 is an apocalyptic number.

140525531 is a deficient number, since it is larger than the sum of its proper divisors (1).

140525531 is an equidigital number, since it uses as much as digits as its factorization.

140525531 is an odious number, because the sum of its binary digits is odd.

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

The square root of 140525531 is about 11854.3465024437. The cubic root of 140525531 is about 519.8983171494.

The spelling of 140525531 in words is "one hundred forty million, five hundred twenty-five thousand, five hundred thirty-one".