1551544942 has 4 divisors (see below), whose sum is σ = 2327317416. Its totient is φ = 775772470.

The previous prime is 1551544937. The next prime is 1551544991. The reversal of 1551544942 is 2494451551.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 1551544895 and 1551544904.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 387886234 + ... + 387886237.

It is an arithmetic number, because the mean of its divisors is an integer number (581829354).

Almost surely, 2^1551544942 is an apocalyptic number.

1551544942 is a deficient number, since it is larger than the sum of its proper divisors (775772474).

1551544942 is an equidigital number, since it uses as much as digits as its factorization.

1551544942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 775772473.

The product of its digits is 144000, while the sum is 40.

The square root of 1551544942 is about 39389.6552663260. The cubic root of 1551544942 is about 1157.6789055878.

The spelling of 1551544942 in words is "one billion, five hundred fifty-one million, five hundred forty-four thousand, nine hundred forty-two".