1023553431 has 12 divisors (see below), whose sum is σ = 1479429952. Its totient is φ = 681924096.

The previous prime is 1023553423. The next prime is 1023553469. The reversal of 1023553431 is 1343553201.

1023553431 is a `hidden beast` number, since 102 + 3 + 553 + 4 + 3 + 1 = 666.

It is not a de Polignac number, because 1023553431 - 2³ = 1023553423 is a prime.

It is a super-2 number, since 2×1023553431² = 2095323252223743522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1023553395 and 1023553404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1023553031) 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, 22186 + ... + 50391.

Almost surely, 2^1023553431 is an apocalyptic number.

1023553431 is a deficient number, since it is larger than the sum of its proper divisors (455876521).

1023553431 is a wasteful number, since it uses less digits than its factorization.

1023553431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74150 (or 74147 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

The square root of 1023553431 is about 31993.0215984674. The cubic root of 1023553431 is about 1007.7902973396.

The spelling of 1023553431 in words is "one billion, twenty-three million, five hundred fifty-three thousand, four hundred thirty-one".