139400215 has 8 divisors (see below), whose sum is σ = 167589360. Its totient is φ = 111314112.

The previous prime is 139400203. The next prime is 139400231. The reversal of 139400215 is 512004931.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 139400215 - 2¹¹ = 139398167 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 139400215.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22750 + ... + 28219.

It is an arithmetic number, because the mean of its divisors is an integer number (20948670).

Almost surely, 2^139400215 is an apocalyptic number.

139400215 is a deficient number, since it is larger than the sum of its proper divisors (28189145).

139400215 is an equidigital number, since it uses as much as digits as its factorization.

139400215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51521.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 139400215 is about 11806.7868194526. The cubic root of 139400215 is about 518.5068296587.

The spelling of 139400215 in words is "one hundred thirty-nine million, four hundred thousand, two hundred fifteen".