431111947 has 12 divisors (see below), whose sum is σ = 517676736. Its totient is φ = 357603120.

The previous prime is 431111921. The next prime is 431111951. The reversal of 431111947 is 749111134.

It is not a de Polignac number, because 431111947 - 2⁷ = 431111819 is a prime.

It is a super-2 number, since 2×431111947² = 371715021692261618, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (431111917) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 140388 + ... + 143425.

It is an arithmetic number, because the mean of its divisors is an integer number (43139728).

Almost surely, 2^431111947 is an apocalyptic number.

431111947 is a deficient number, since it is larger than the sum of its proper divisors (86564789).

431111947 is a wasteful number, since it uses less digits than its factorization.

431111947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283858 (or 283851 counting only the distinct ones).

The product of its digits is 3024, while the sum is 31.

The square root of 431111947 is about 20763.2354656012. The cubic root of 431111947 is about 755.4342761275.

The spelling of 431111947 in words is "four hundred thirty-one million, one hundred eleven thousand, nine hundred forty-seven".