1431640245 has 32 divisors (see below), whose sum is σ = 2708133120. Its totient is φ = 631895040.

The previous prime is 1431640241. The next prime is 1431640271. The reversal of 1431640245 is 5420461341.

It is not a de Polignac number, because 1431640245 - 2² = 1431640241 is a prime.

It is a super-2 number, since 2×1431640245² = 4099187582207320050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1431640241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 232036 + ... + 238125.

It is an arithmetic number, because the mean of its divisors is an integer number (84629160).

Almost surely, 2^1431640245 is an apocalyptic number.

1431640245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1431640245 is a deficient number, since it is larger than the sum of its proper divisors (1276492875).

1431640245 is a wasteful number, since it uses less digits than its factorization.

1431640245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 470205.

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 1431640245 is about 37837.0221476268. The cubic root of 1431640245 is about 1127.0537615281.

The spelling of 1431640245 in words is "one billion, four hundred thirty-one million, six hundred forty thousand, two hundred forty-five".