1018225431 has 16 divisors (see below), whose sum is σ = 1509042400. Its totient is φ = 678564864.

The previous prime is 1018225427. The next prime is 1018225501. The reversal of 1018225431 is 1345228101.

1018225431 is a `hidden beast` number, since 1 + 0 + 1 + 8 + 225 + 431 = 666.

It is not a de Polignac number, because 1018225431 - 2² = 1018225427 is a prime.

It is a super-2 number, since 2×1018225431² = 2073566056670271522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1018225395 and 1018225404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1018225031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93015 + ... + 103383.

It is an arithmetic number, because the mean of its divisors is an integer number (94315150).

Almost surely, 2^1018225431 is an apocalyptic number.

1018225431 is a deficient number, since it is larger than the sum of its proper divisors (490816969).

1018225431 is a wasteful number, since it uses less digits than its factorization.

1018225431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14015 (or 14009 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 1018225431 is about 31909.6447958920. The cubic root of 1018225431 is about 1006.0386055114.

The spelling of 1018225431 in words is "one billion, eighteen million, two hundred twenty-five thousand, four hundred thirty-one".