1974225557 has 4 divisors (see below), whose sum is σ = 1975065516. Its totient is φ = 1973385600.

The previous prime is 1974225523. The next prime is 1974225581. The reversal of 1974225557 is 7555224791.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7555224791 = 103 ⋅73351697.

It can be written as a sum of positive squares in 2 ways, for example, as 842508676 + 1131716881 = 29026^2 + 33641^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1974225557 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 (1974225157) 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, 416444 + ... + 421157.

It is an arithmetic number, because the mean of its divisors is an integer number (493766379).

Almost surely, 2^1974225557 is an apocalyptic number.

It is an amenable number.

1974225557 is a deficient number, since it is larger than the sum of its proper divisors (839959).

1974225557 is an equidigital number, since it uses as much as digits as its factorization.

1974225557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 839958.

The product of its digits is 882000, while the sum is 47.

The square root of 1974225557 is about 44432.2580677597. The cubic root of 1974225557 is about 1254.4853383017.

The spelling of 1974225557 in words is "one billion, nine hundred seventy-four million, two hundred twenty-five thousand, five hundred fifty-seven".