140506815 has 16 divisors (see below), whose sum is σ = 226194048. Its totient is φ = 74475936.

The previous prime is 140506813. The next prime is 140506837. The reversal of 140506815 is 518605041.

It is not a de Polignac number, because 140506815 - 2¹ = 140506813 is a prime.

It is a super-2 number, since 2×140506815² = 39484330122888450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140506811) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26289 + ... + 31178.

It is an arithmetic number, because the mean of its divisors is an integer number (14137128).

Almost surely, 2^140506815 is an apocalyptic number.

140506815 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

140506815 is a deficient number, since it is larger than the sum of its proper divisors (85687233).

140506815 is a wasteful number, since it uses less digits than its factorization.

140506815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57638.

The product of its (nonzero) digits is 4800, while the sum is 30.

The square root of 140506815 is about 11853.5570610682. The cubic root of 140506815 is about 519.8752351067.

The spelling of 140506815 in words is "one hundred forty million, five hundred six thousand, eight hundred fifteen".