397220302431 has 40 divisors (see below), whose sum is σ = 628358157504. Its totient is φ = 249206492160.

The previous prime is 397220302429. The next prime is 397220302513. The reversal of 397220302431 is 134203022793.

397220302431 is a `hidden beast` number, since 3 + 97 + 220 + 302 + 43 + 1 = 666.

It is not a de Polignac number, because 397220302431 - 2¹ = 397220302429 is a prime.

It is a super-2 number, since 2×397220302431² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397220302231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 19709946 + ... + 19730088.

Almost surely, 2^397220302431 is an apocalyptic number.

397220302431 is a deficient number, since it is larger than the sum of its proper divisors (231137855073).

397220302431 is a wasteful number, since it uses less digits than its factorization.

397220302431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34493 (or 34484 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 36.

The spelling of 397220302431 in words is "three hundred ninety-seven billion, two hundred twenty million, three hundred two thousand, four hundred thirty-one".