1051561357 has 16 divisors (see below), whose sum is σ = 1368041472. Its totient is φ = 783771120.

The previous prime is 1051561339. The next prime is 1051561361. The reversal of 1051561357 is 7531651501.

It is not a de Polignac number, because 1051561357 - 2⁷ = 1051561229 is a prime.

It is a super-2 number, since 2×1051561357² = 2211562575071362898, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1051561457) 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, 295113 + ... + 298654.

It is an arithmetic number, because the mean of its divisors is an integer number (85502592).

Almost surely, 2^1051561357 is an apocalyptic number.

It is an amenable number.

1051561357 is a deficient number, since it is larger than the sum of its proper divisors (316480115).

1051561357 is a wasteful number, since it uses less digits than its factorization.

1051561357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 593808.

The product of its (nonzero) digits is 15750, while the sum is 34.

The square root of 1051561357 is about 32427.7868039125. The cubic root of 1051561357 is about 1016.8999033578.

The spelling of 1051561357 in words is "one billion, fifty-one million, five hundred sixty-one thousand, three hundred fifty-seven".