1971554162 has 4 divisors (see below), whose sum is σ = 2957331246. Its totient is φ = 985777080.

The previous prime is 1971554161. The next prime is 1971554201. The reversal of 1971554162 is 2614551791.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 1155252121 + 816302041 = 33989^2 + 28571^2 .

It is not an unprimeable number, because it can be changed into a prime (1971554161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 492888539 + ... + 492888542.

Almost surely, 2^1971554162 is an apocalyptic number.

1971554162 is a deficient number, since it is larger than the sum of its proper divisors (985777084).

1971554162 is an equidigital number, since it uses as much as digits as its factorization.

1971554162 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 985777083.

The product of its digits is 75600, while the sum is 41.

The square root of 1971554162 is about 44402.1864551736. The cubic root of 1971554162 is about 1253.9192532799.

The spelling of 1971554162 in words is "one billion, nine hundred seventy-one million, five hundred fifty-four thousand, one hundred sixty-two".