83401387220 has 48 divisors (see below), whose sum is σ = 177318079680. Its totient is φ = 32948729856.

The previous prime is 83401387213. The next prime is 83401387231. The reversal of 83401387220 is 2278310438.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 458819 + ... + 614261.

It is an arithmetic number, because the mean of its divisors is an integer number (3694126660).

Almost surely, 2^83401387220 is an apocalyptic number.

It is an amenable number.

83401387220 is an abundant number, since it is smaller than the sum of its proper divisors (93916692460).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

83401387220 is a wasteful number, since it uses less digits than its factorization.

83401387220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155784 (or 155782 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 38.

Adding to 83401387220 its reverse (2278310438), we get a palindrome (85679697658).

The spelling of 83401387220 in words is "eighty-three billion, four hundred one million, three hundred eighty-seven thousand, two hundred twenty".