1551022540 has 36 divisors (see below), whose sum is σ = 3460027536. Its totient is φ = 583912192.

The previous prime is 1551022537. The next prime is 1551022547. The reversal of 1551022540 is 452201551.

It is not an unprimeable number, because it can be changed into a prime (1551022547) 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 11 ways as a sum of consecutive naturals, for example, 128392 + ... + 139951.

It is an arithmetic number, because the mean of its divisors is an integer number (96111876).

Almost surely, 2^1551022540 is an apocalyptic number.

1551022540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1551022540 is an abundant number, since it is smaller than the sum of its proper divisors (1909004996).

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

1551022540 is a wasteful number, since it uses less digits than its factorization.

1551022540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268386 (or 268367 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 1551022540 is about 39383.0234999803. The cubic root of 1551022540 is about 1157.5489616317.

The spelling of 1551022540 in words is "one billion, five hundred fifty-one million, twenty-two thousand, five hundred forty".