331572077 has 4 divisors (see below), whose sum is σ = 333020220. Its totient is φ = 330123936.

The previous prime is 331572053. The next prime is 331572083. The reversal of 331572077 is 770275133.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 770275133 = 2113 ⋅364541.

It can be written as a sum of positive squares in 2 ways, for example, as 151314601 + 180257476 = 12301^2 + 13426^2 .

It is a cyclic number.

It is not a de Polignac number, because 331572077 - 2⁶ = 331572013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331574077) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 723728 + ... + 724185.

It is an arithmetic number, because the mean of its divisors is an integer number (83255055).

Almost surely, 2^331572077 is an apocalyptic number.

It is an amenable number.

331572077 is a deficient number, since it is larger than the sum of its proper divisors (1448143).

331572077 is a wasteful number, since it uses less digits than its factorization.

331572077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1448142.

The product of its (nonzero) digits is 30870, while the sum is 35.

The square root of 331572077 is about 18209.1207091391. The cubic root of 331572077 is about 692.1379302558.

The spelling of 331572077 in words is "three hundred thirty-one million, five hundred seventy-two thousand, seventy-seven".