1023540551 has 4 divisors (see below), whose sum is σ = 1116589704. Its totient is φ = 930491400.

The previous prime is 1023540527. The next prime is 1023540559. The reversal of 1023540551 is 1550453201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1550453201 = 11 ⋅140950291.

It is a cyclic number.

It is not a de Polignac number, because 1023540551 - 2¹⁰ = 1023539527 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1023540551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1023540559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46524560 + ... + 46524581.

It is an arithmetic number, because the mean of its divisors is an integer number (279147426).

Almost surely, 2^1023540551 is an apocalyptic number.

1023540551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1023540551 is a deficient number, since it is larger than the sum of its proper divisors (93049153).

1023540551 is an equidigital number, since it uses as much as digits as its factorization.

1023540551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93049152.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 1023540551 is about 31992.8203039369. The cubic root of 1023540551 is about 1007.7860701076.

Adding to 1023540551 its reverse (1550453201), we get a palindrome (2573993752).

The spelling of 1023540551 in words is "one billion, twenty-three million, five hundred forty thousand, five hundred fifty-one".