197153812 has 12 divisors (see below), whose sum is σ = 348073236. Its totient is φ = 97704320.

The previous prime is 197153809. The next prime is 197153819. The reversal of 197153812 is 218351791.

It can be written as a sum of positive squares in 2 ways, for example, as 57062916 + 140090896 = 7554^2 + 11836^2 .

It is a super-2 number, since 2×197153812² = 77739251172262688, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197153819) 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, 217639 + ... + 218542.

It is an arithmetic number, because the mean of its divisors is an integer number (29006103).

Almost surely, 2^197153812 is an apocalyptic number.

It is an amenable number.

197153812 is a deficient number, since it is larger than the sum of its proper divisors (150919424).

197153812 is a wasteful number, since it uses less digits than its factorization.

197153812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436298 (or 436296 counting only the distinct ones).

The product of its digits is 15120, while the sum is 37.

The square root of 197153812 is about 14041.1471041365. The cubic root of 197153812 is about 582.0161818499.

The spelling of 197153812 in words is "one hundred ninety-seven million, one hundred fifty-three thousand, eight hundred twelve".