1023156534 has 16 divisors (see below), whose sum is σ = 2093902272. Its totient is φ = 333120648.

The previous prime is 1023156529. The next prime is 1023156551. The reversal of 1023156534 is 4356513201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1982604 + ... + 1983119.

It is an arithmetic number, because the mean of its divisors is an integer number (130868892).

Almost surely, 2^1023156534 is an apocalyptic number.

1023156534 is an abundant number, since it is smaller than the sum of its proper divisors (1070745738).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1023156534 is a wasteful number, since it uses less digits than its factorization.

1023156534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3965771.

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 1023156534 is about 31986.8181287230. The cubic root of 1023156534 is about 1007.6600189568.

Adding to 1023156534 its reverse (4356513201), we get a palindrome (5379669735).

The spelling of 1023156534 in words is "one billion, twenty-three million, one hundred fifty-six thousand, five hundred thirty-four".