371316561 has 48 divisors (see below), whose sum is σ = 631304640. Its totient is φ = 191963520.

The previous prime is 371316553. The next prime is 371316593. The reversal of 371316561 is 165613173.

It is a happy number.

It is not a de Polignac number, because 371316561 - 2³ = 371316553 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

371316561 is a Rhonda number in base 10.

Its product of digits (11340) is a multiple of the sum of its prime factors (1134).

It is not an unprimeable number, because it can be changed into a prime (371316961) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 447495 + ... + 448323.

It is an arithmetic number, because the mean of its divisors is an integer number (13152180).

Almost surely, 2^371316561 is an apocalyptic number.

It is an amenable number.

371316561 is a deficient number, since it is larger than the sum of its proper divisors (259988079).

371316561 is a wasteful number, since it uses less digits than its factorization.

371316561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1134 (or 1127 counting only the distinct ones).

The product of its digits is 11340, while the sum is 33.

The square root of 371316561 is about 19269.5760461926. The cubic root of 371316561 is about 718.7559284098.

The spelling of 371316561 in words is "three hundred seventy-one million, three hundred sixteen thousand, five hundred sixty-one".