1951994535 has 16 divisors (see below), whose sum is σ = 3155391456. Its totient is φ = 1030330368.

The previous prime is 1951994501. The next prime is 1951994537. The reversal of 1951994535 is 5354991591.

It is not a de Polignac number, because 1951994535 - 2¹⁶ = 1951928999 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1951994537) 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, 669334 + ... + 672243.

It is an arithmetic number, because the mean of its divisors is an integer number (197211966).

Almost surely, 2^1951994535 is an apocalyptic number.

1951994535 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1951994535 is a deficient number, since it is larger than the sum of its proper divisors (1203396921).

1951994535 is a wasteful number, since it uses less digits than its factorization.

1951994535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1341682.

The product of its digits is 1093500, while the sum is 51.

The square root of 1951994535 is about 44181.3822214742. The cubic root of 1951994535 is about 1249.7587875896.

The spelling of 1951994535 in words is "one billion, nine hundred fifty-one million, nine hundred ninety-four thousand, five hundred thirty-five".