1020197431 has 4 divisors (see below), whose sum is σ = 1112942664. Its totient is φ = 927452200.

The previous prime is 1020197417. The next prime is 1020197441. The reversal of 1020197431 is 1347910201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1347910201 = 11 ⋅122537291.

It is a cyclic number.

It is not a de Polignac number, because 1020197431 - 2¹³ = 1020189239 is a prime.

It is a super-2 number, since 2×1020197431² = 2081605596437999522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1020197431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020197401) 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, 46372600 + ... + 46372621.

It is an arithmetic number, because the mean of its divisors is an integer number (278235666).

Almost surely, 2^1020197431 is an apocalyptic number.

1020197431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1020197431 is a deficient number, since it is larger than the sum of its proper divisors (92745233).

1020197431 is an equidigital number, since it uses as much as digits as its factorization.

1020197431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92745232.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 1020197431 is about 31940.5295979888. The cubic root of 1020197431 is about 1006.6876526016.

The spelling of 1020197431 in words is "one billion, twenty million, one hundred ninety-seven thousand, four hundred thirty-one".