2491551942 has 32 divisors (see below), whose sum is σ = 5538689280. Its totient is φ = 740769120.

The previous prime is 2491551941. The next prime is 2491551949.

2491551942 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 2491551894 and 2491551903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2491551941) 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, 352642 + ... + 359637.

It is an arithmetic number, because the mean of its divisors is an integer number (173084040).

Almost surely, 2^2491551942 is an apocalyptic number.

2491551942 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

2491551942 is an abundant number, since it is smaller than the sum of its proper divisors (3047137338).

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

2491551942 is a wasteful number, since it uses less digits than its factorization.

2491551942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 712348.

The product of its digits is 129600, while the sum is 42.

The square root of 2491551942 is about 49915.4479294737. The cubic root of 2491551942 is about 1355.6783125410.

The spelling of 2491551942 in words is "two billion, four hundred ninety-one million, five hundred fifty-one thousand, nine hundred forty-two".