1551050540 has 96 divisors (see below), whose sum is σ = 3683062656. Its totient is φ = 544389120.

The previous prime is 1551050513. The next prime is 1551050561. The reversal of 1551050540 is 450501551.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1081664 + ... + 1083096.

It is an arithmetic number, because the mean of its divisors is an integer number (38365236).

Almost surely, 2^1551050540 is an apocalyptic number.

1551050540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1551050540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1841531328).

1551050540 is an abundant number, since it is smaller than the sum of its proper divisors (2132012116).

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

1551050540 is a wasteful number, since it uses less digits than its factorization.

1551050540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1659 (or 1657 counting only the distinct ones).

The product of its (nonzero) digits is 2500, while the sum is 26.

The square root of 1551050540 is about 39383.3789814942. The cubic root of 1551050540 is about 1157.5559271819. Note that the first 3 decimals are identical.

The spelling of 1551050540 in words is "one billion, five hundred fifty-one million, fifty thousand, five hundred forty".