1020154531 has 16 divisors (see below), whose sum is σ = 1124513280. Its totient is φ = 917785120.

The previous prime is 1020154523. The next prime is 1020154549. The reversal of 1020154531 is 1354510201.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1020154531 - 2³ = 1020154523 is a prime.

It is a super-2 number, since 2×1020154531² = 2081430534239659922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1020154591) 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, 453696 + ... + 455938.

It is an arithmetic number, because the mean of its divisors is an integer number (70282080).

Almost surely, 2^1020154531 is an apocalyptic number.

1020154531 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1020154531 is a deficient number, since it is larger than the sum of its proper divisors (104358749).

1020154531 is a wasteful number, since it uses less digits than its factorization.

1020154531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2666.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 1020154531 is about 31939.8580303670. The cubic root of 1020154531 is about 1006.6735417690.

Adding to 1020154531 its reverse (1354510201), we get a palindrome (2374664732).

It can be divided in two parts, 1020 and 154531, that added together give a palindrome (155551).

The spelling of 1020154531 in words is "one billion, twenty million, one hundred fifty-four thousand, five hundred thirty-one".