137801215 has 4 divisors (see below), whose sum is σ = 165361464. Its totient is φ = 110240968.

The previous prime is 137801203. The next prime is 137801221. The reversal of 137801215 is 512108731.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 137801215 - 2⁹ = 137800703 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13780117 + ... + 13780126.

It is an arithmetic number, because the mean of its divisors is an integer number (41340366).

Almost surely, 2^137801215 is an apocalyptic number.

137801215 is a deficient number, since it is larger than the sum of its proper divisors (27560249).

137801215 is an equidigital number, since it uses as much as digits as its factorization.

137801215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27560248.

The product of its (nonzero) digits is 1680, while the sum is 28.

The square root of 137801215 is about 11738.8762238981. The cubic root of 137801215 is about 516.5166777017.

Adding to 137801215 its reverse (512108731), we get a palindrome (649909946).

The spelling of 137801215 in words is "one hundred thirty-seven million, eight hundred one thousand, two hundred fifteen".